MTN not wanting to cancel my contract it’s been 3 months now

I have 3 contracts with mtn now that i have finished paying for one of the contracts i have been trying to contact them for the past 3 months to cancel but am given excuses every time and right now am paying on a month to month basis and i no longer need their data .. mtn is just ******* why can’t they cancel the contracts once we finish the period instead of them to give us a run around with our money. People don’t take a contract with mtn they are a **** when it’s time to cancel they will make u cry but you will several calls for an upgrade but they fail to cancel your contract i am never taking a contract with mtn it’s the worst😬💩💩