No Service

I am so tired of dealing with supersonic. They are a waste of time and my money. Every time you call them. you are put on hold forever and no one comes back to you. when you try to speak to them on WhatsApp, you send them a message, while you are waiting for a reply after a couple of minutes, they just end the chat and say that them didn't receive a reply from you. I have been replying for over the year to solve an amount that is on my statement, that no one can tell me what it is for. Every time they say someone for the accounts department will call you to sort it out. They call but when you answer they drop the call. Now they want to suspend my line because of this outstanding amount. I have no words for their service. More like no service.