MTN is a ****

MTN contract department is a ****, they don't answer the phones on purpose when canceling the contract the day you get them your contract has been extended without your concern. My 12month contract was ending in January month. I made my last payment on the 25th as I was told yet now iam told I stil have to pay about R1600+ our 24 month has just ended and I refused to upgrade. Mtn is really a ****.