Dstv fed up with incapable call center staff

Pathetic service from these people I have been a subscriber from August 2018 I signed a debit order for them to deduct the subscription fee from my account. I now keep getting sms to say my account is in arrears but they have been doing the deduction for the past 13 months. On Saturday they promptly stopped some of my services and now they tell me I owe them 3 months subscription. I have tried 3 times to get someone at the call center to see if they can assist me with this issue but to no avail. I I am fed up really bad service no wonder they are loosing customers.