HOW TO SUCCESSFULLY CHANGE ADDRESS IN VAWA CASE

[Gratitude 2]

Hi everyone.

I have sent AR11 more than once to USCIS for them to change my address. After the first time, more than a month later, they sent me mail to the old address. Luckily, the letter was forwarded to my new address. That's when I knew the changes hadn't taken effect. I reapplied for change of address. After waiting more than another month, I sent another letter to confirm if the change was successful. The reason for this is that when I called the call center, I get told that they have no information on my file. 

I just took a chance and called call center again, more than 3 months after my last correspondence to them. I was transferred to a tier 2 agent, without even asking. He immediately told me to write a letter to Immigrations as he has no info on my account. It doesn't matter what I asked him, all he kept telling me was the same thing.

My question to you is, how many times have you had to write to USCIS before your address was finally changed? Also, other than my next mail being sent to the wrong address, and risking them landing in wrong hands, which could not end well, how do I find out if the address has been changed or not? I am expecting Prima Facie in the next month or so. 

Thanks