**************** with MTN

My contract with MTN was for 24 months. It was a 10g contract for R199 per month. It should have ended in Dec 2020. They called me to ask if I wanted to upgrade it.I said no I would keep it on a prepaid. They then debited me for R320 per month without advising me. This is highway *******. They could have told me this in the first place and I would have terminated it immediately. They could have provided data to the value of 199 per month instead of increasing my debit order without my permission