Unanswered Emails-Pathetic Customer Service

I have in the last couple of months received such poor service from MTN when trying to cancel my Data contract. I have sent an email to [Email Removed] on the 13th April 2014, to cancel my contract, I have not received any response from them. After waiting for a substantial time to get feedback, I called the 808 call centre, waited for about 15mins to speak to an actual person, listening to the most annoying music, I was told that I would need to send an email to [Email Removed] (21 April 2014). I waited the 2 days for a response and received nothing. I sent a follow up email on the 24th April 2014, and still nothing. I called the call centre once again, and was advised to send an email to [Email Removed] To date, I have received no feedback!!! This is quite frustrating as I would like to cancel my contract, In my opinion, this lack of response to cancellation requests is a method of getting more debit orders from their customers .. I would definitely not have any further dealing with MTN since their customers are clearly not a priority, judging by ALL the complaints on this site...