contract issues

My contract was due to end on 31 May and I called MTN in April and I was told a long story that was making it impossible to cancel the contract. I then went on their website and there was an email address provided there that I needed to email in which I did and never got the response. I then called 808 to find out if my email was received and was advised that I need to call at the end of May and it will be cancelled.<br> I have been trying to call then again at 808 since the 31st of May and never been able to get through to anyone due to technical problems on their side and end up holding for over 30minutes everytime. An sms now came through on my phone with the airtime and sms I get every month and this now means I will be billed again after having tried so hard to cancel my contract when it came to an end and also I am on maternity leave with no income so when they bill me now I will be left with a negative balance on my account due to their incompetence of which I am not at all happy about. Their service really leaves a sour taste in my mouth and doubt I can ever get a contract from them again as I see this as being *****ed.