MTN SA -***** at its best

MTN has charged me R1430 to cancel a contract that ended in December. They have been billing me without me knowing. They said all the data they loaded on the expired contract sim has expired and I have to pay R1430 so they can stop charging me on a month to month basis. What I don’t in I why they didn’t tell me in December I need to cancel an expired contract. Now I have paid R1430 they say no we can’t cancel it today we will put the contract on a 20 days notice and charge you an extra R200 for those 20 days until our system updates