Bad service

I will never ever trust or tell anyone about supersonic. Theyre service is poor . Even after a year that i closed my account they still sent me messages to say i owe them and they even gave me over to someone to get the money . This is pathetic . Why after a year ???? I will not pay that money . They can not send you email to give statements . They even bill you wrong and say did not find your payment but then it is there and they double charge you