Instagram Account Disabled due to Copyright

Hello. My Instagram Fan Page account got disabeled 6 months ago. Even tho I don't know the exact reason, it only says that i violated their guidelines. I guess it's because of copyright since few of my videos got blocked because of that. They were only 15 sec long videos from performances of my fave artists. Other Fan Pages, my friend posted them too, but their accounts didn't got disabeled. I saw that some people get their videos blocked because of copyright every week, yet they never got such problems. Some accounts even got reactivated even though they were disabeled because of copyright. But it's been 6 months for me. After sending a mugshot on March 14th, on March 15th got a reply from them saying "We just investigated your report and it looks like this is no longer an issue. If it comes up again, just reply to this message and let us know what's going on and we'll do our best to help" but the account is still disabeled. I replied multiple times, but no answer. Can someone help me or suggest me what to do, please?