Umingle Blocked My Account Without Warning Or Explanation, Request Recovery

Hello, I am contacting you to report that my Umingle account was banned without any reason and that, in order to use the service again, I am being asked to pay €4.99 for an “Instant Unban” by entering my credit card details. I use Umingle from my PC Chromebook through the browser and I had been using the service for only one day. The ban occurred yesterday at around 3:00 a.m. When I tried to access my account, I was shown a screen stating that my account had been banned and that I had to pay €4.99 for an immediate unban. I find it unfair and not transparent to be banned without a clear and justified reason and to be asked for a payment to recover access. I have not received any prior warning, nor do I know what rule I may allegedly have violated. I therefore kindly ask you to unblock my account free of charge, to restore my access to the service, and to provide me with a clear explanation of the reasons that led to the ban. Best regards