Unhappy loyal customer for over 5 years

Hey my name is Tshepo I’m really disappointed in the service MTN has given from the service provider to the stuff and call centre agents. I have been with MTN for over 7 years now. I have been paying for my subscription with no fail to my payments not even once, in December they failed to set a debit order for the month and blocked my account I called to query this issue they said it’s their fault and now they treat me as a ********. The threatening me with lawsuits and harassment, they have taken my account to a 3rd party collection company for one payment they have messed up on I’m not happy. I called to arrange that payment to be taken in January however they have not I then called spoke to a couple of their customer support team they have failed me. To day I call I have emailed raised complaints no one is will to help the stuff is so useless to the point one was speaking in zulu which I’m not offended by but when she said “ yey baba” I felt the disrespect. All I wanted to do was pay but they have messed up my credit score for their mistake.