I Want My Access to Tandem or a Refund

Hi, my name is Brian J***, and my Tandem account is jo***@gmail.com. I was banned on Tandem because I am a total beginner in the English language and tried to communicate with someone there, but perhaps I came across as improper. I would like to request access to my account or a refund of my money. I didn’t receive ANY WARNING in advance, which is VERY UNFAIR! Please send me a reply via email at jo***@gmail.com. Thank you!