MTN In Breach of Contract by charging R700 extra in one month/ no end in sight.

Good day Sir/Madam, Having contacted you about my very on going bad experience with MTN, my contract is R1299 a month and i have 2 other contracts of R199 with NTN, and on the 27 th September,2020 R2210 , was deducted from my account I phoned last week and spoke with Palesa, who said she'd get a manager to contact me, and didn't, and then MTN asked me to do survey and I complained and didn't here further.on friday last week and spoke with Buhle, and she said I'd be contacted by a manager Thami Gumbi and didn't hear further, I took this up with Hell Peter,com over the weekend and haven't heard anything, I then phoned and spoke with Brenda phiri today who told me I must pay extra as i had gone direct, and i believe they are in breach of contract, as i have never agreed to this. After being cut off again I phoned and spoke to Lunga mzobe who said he'd get a manager on the line, and someone said hello, and was cut off . I then get 2 messages saying the matter is closed. What kind of company is this without any regard for consumers and reckless behavior. When does their MD take any notice at all? recommend them to who?