Slightly OT, but I noticed I've been banned from posting reviews or asking questions on Amazon. No idea why. I don't review usually and my last review was in 20

Slightly OT, but I noticed I've been banned from posting reviews or asking questions on Amazon. No idea why. I don't review usually and my last review was in 2017! I only noticed it a few days back because I wanted to ask a question on a product. Does anybody know how to get out of their blacklist ? I tried emailing but get no response.