Incompetence affecting my credit score and costing me more money!

Worst service provider! I had a complaint regarding my debit order details since December 2022 after changing my bank, I called the call centre constantly every day trying to explain that they need to debit on 25 not 30. It took months for that. In April I laid a complaint because they were still debiting the wrong date and I was going into arrears, getting my credit score affected and incurring bounced fees from my bank. The complaint I laid was even with the CEO and other management, to date I had no reply to all 4 emails I sent. Now I have another complaint and they’re just ignoring me - they changed my banking details without my consent! I’m in arrears and I’m close to the end of my 24 month contract. I’m settling this account and never ever going back to MTN. I will post my experience all over social media so that no one goes through this nonsense. This has affected my credit score AGAIN!