Accounts department ripping me off

DSTV accounts department has been ripping me off for over a year. I have DSTV compact price lock subscription. I have been paying R668 every month when i should have been paying R594. now i get an sms that my debit order is R747 this month. I have not rented any movies on Showmax. Every couple of months they throw a new debit order at me. i called yesterday 27.01.2020 and asked that it be sorted out. The guy takes my info and is very nice over the phone and says he has elevated the complaint. So i call again today because i have not received any reference numbers. My complaint is not listed and has certainly not been elevated. i am still on the phone waiting to speak to a supervisor as of now i have been holding on for 43 minutes. Unacceptable from such a large company!!