Bad account management and poor service

I get a message saying my account is not paid. Supersonic changes my bill every month... That should be the biggest concern already... So I over pay to make sure I don't go into arrears. Now they saying I am in arrears... Can't call the provider where the only option is to WhatsApp were I'm getting the slowest responses. They say they're checking my account where I stupidly have over paid. If you are going to cancel or suspend my account, just know that the made up amount is not going to be paid and I will consider this as you giving me an opportunity to move to another provider.