the incompetence that knows no bounds

Where do I begin with the nonsense service provided by mtn. after two terms of insanely bad service from mtn on the 3rd February I cancelled my contract which expired on the 3rd March. The retentions department called me to convince me otherwise but no one bothered to cancel my contract. On the 15th March I was credited with airtime and data. I called and emailed mtn requesting them to reserve the transaction their agent only canceled the contract. When the airtime and data was still on my phone I went to the store that told me the contract had only been canceled the day before and I would be debited. A few days later I was invoiced I sent a copy of the invoice to mtn repeating the complaint after receiving reference numbers nothing has happened regardless of numerous efforts on my part to get them to resolve the issue. I refuse to have my account debited for their incompetence.