Biggest regret is renewing my price lock contract. These billing issues make me want to leave

Multichoice has been charging me the wrong amount for the last 2 months. Each month I call, get told I'll be refunded, nothing happens and now I got another notification I'm going to be billed R1003 on the 25th!!!!!!!!

Could someone in accounts take a look at this? And fix it permanently! My biggest regret is letting you guys debit order my account because you are irresponsible with it! This is my money! I need people who respect that

Please look at this and contact me with solutions because if I have to call in 1 more time I'm going to lose it.