Vodacom Treats their customers like ****

Hello Peter,I've had a contract with vodacom and it was expiring this year July,I've contacted vodacom before the end of July to cancel but was told my account was in arrears,only to find out they've charged me R100 in arrears because i've paid my account after two days of the expected payment date,I've them disputed that and the arrears was cancelled,I've called them again early August and they've promised to cancel the contract but to my surprise it was not cancelled and I've paid for the contract again and i the called them Mid August and the told me they will cancel it and will be credited back with the money they took,but still nothing happened I've just received a statement for this month and the amount is still reflected ,I've then called them again and the guy that was helping me said he can see that I've been calling them for cancellation and said he'll escalate this to his superiors and will receive an email after three days to show the cancellation but still I haven't receive anything,I'm soo frustrated cos I don't want to reverse my debits as it my affect my credit record,I've been with vodacom for the past 20years and have 3 contracts with them and it seems I'm not appreciated.Instead of being rewarded to being a loyal customer I'm being treated like ****.