My Google maps account was blocked also when traveling, but fortunately after several weeks I was able to get that one back.
With Instagram though I just had to make a new account. I also have a Meta Business account (business.facebook.com) and the Instagram account was linked there. The Facebook business account, pages were never blocked though, just the Instagram one.
Unfortunately after a few months I just had to accept it and make a new account. I hope you have more luck, but I assume it's the same with any Meta products. There is no support you can contact, no way to get redress. If it's possible, try to avoid using Meta products to build anything. I understand that's not always possible though, I run a bakery and absolutely must have both Google Maps and Instagram, much as I wish I didn't.