Elham

Actually they did not ask for my original BC. The official translation, which is stamped by the ministry of foreign affairs is what they care about. Do not worry at all. Go ahead and schedule the interview.

Hello,
Does anyone know how long it takes for the department which handles G-884 forms to get back? Does it take weeks or months? or is there any phone number to call and check the status on?

Yea, more like thousands of dollars

This is actually not correct. The foreign spouse is required to file to remove conditions on his/her residency during a 90 day window of time prior to the expiry date of the 2 year card. If they are still married, then the petition is a joint petition by both husband and wife and includes documentary evidence that shows how they have mingled together their financial, social and personal lives. If the evidence is satisfactory, the 10 year card is often issued without an interview.
If the couple is divorced, then the foreign ex-spouse files the petition to remove conditions on his or her own, filling out a waiver option on the form to file individually due to a divorce (or death, or one of the other waiver options for filing individually,as the case may be). The person still needs to provide evidence that the marriage was entered into in good faith, and that the marriage just did not survive, for whatever reasons. Sometimes those reasons can have an impact on the application (abuse,etc.). If the documentary evidence is compelling, again the 10 year green card can be issued without an interview. If there is less compelling evidence, or if there is a suspicion that the marriage was not a real one, then the applicant will likely be called in for an interview and the decision will be based on a number of factors, include the results of that interview. If the petitioner convinces the interviewer that the marriage was entered into in good faith, regardless of the outcome of the marriage, he/she will be issued a 10 year green card. If they fail to convince the interviewer that the marriage is valid, then the application will be denied, any residency status terminated or revoked, and the foreign spouse will be told to leave the US.
If the US spouse has evidence that his/her foreign spouse committed fraud - and the breakdown of a marriage is not considered fraud because even valid marriages falter and fail - then he/she needs to submit it to USCIS, making sure that it is factual and accurate, and not resorting to histrionics or emotional complaints about being used for a green card.
To answer the original question directly, there is nothing the US spouse can do to cancel his wife's green card. If he can provide sufficient evidence to convince USCIS that she entered the marriage solely to get a green card then USCIS can take whatever action they deem appropriate - revoking her permanent residence status, or denying her removal of conditions when she applies. That is basically all he can do - report her to ICE/USCIS and provide them with appropriate evidence to back up his claim. (That is also easier said than done). If he does not have any such irrefutable or compelling evidence, it is probably in his best interest to 'cut his losses' and not try to seek any retributive action against her. USCIS is unlikely to act on unsupported accusations, especially when it is from one hurt spouse accusing another. He should just get a divorce and try to move on with his life.

Hang in there, ygr. Try to make the best of this time to say goodbye to the people, food and things around us. I've become a tourist in my residential country, going to visit places I've never been to, visit some favourite places, eat stuff that I'll quadruple the amount in the US, and giving away my possessions to some close friends. Plus, I've been going on Google Map's Streetview to get to know the area better. :-)

Not if they were not asked. Your whole misrepresentation discussion is a total assumption and does nothing to answer the OP's question. Prior visa denials do not affect future visa attempts. Yes they will have that in their system and of course one must show proof of meeting and proof of a valid relationship. Let's assume they have that, OK?