Cell C unable to cancel contracts

Cell C sent me a message in February with the closing balances for my 2 cellphone contracts. I made the payments in March. I went into the Cellc store to check if I am up to date. The consultant confirmed that I am up to date and that I just need to phone into the call centre to cancel the contracts. I contacted the call centre the night only to find out that I should make another 3 months payments on both contracts after they have sent me details in February to pay. I am very disappointed and the service is unacceptable. I will never upgrade or take out a contract with cellc again. Cellc don't want to cancel the contracts because they want more money.. unbelievable<br>