Tandem Account Banned for Over a Year Without Clear Explanation

I had been using the Tandem app for a long time and was a Pro member. My account has been banned for more than a year and a half for allegedly violating the community guidelines, without me receiving any prior warning. When I try to log into the app, I only see a message stating that my account has been banned for violating the community guidelines. Other than that, I have not been given any specific explanation as to why this action was taken.

I believe this decision is unfair because I have not been provided with any details about which rule I allegedly violated, when I violated it, or how I violated it. Despite having a Pro membership, I cannot use my account and am being denied access to a service I paid for. I request that Tandem clearly and specifically inform me of any rule I allegedly violated, review my account again if possible, and remove the ban. I also request appropriate compensation or an extension of my Pro membership in consideration of the inconvenience and loss of service I have experienced.