Refusal to provide Contract Cancellation

I am unhappy with the MTN service and logged a call with MTN to obtain my Contract Cancellation amount. I received an email on 26 Feb 2016 to ask the reasons why I wish to cancel. My response was that I do not wish to go into a discussion and that I want a quote to cancel my contract. Since then I have sent numerous emails, tried their contact centre and every other avenue available and no response. Calls are dropped and emails are ignored. I am at my wits end. This is a prime example of why I wish to leave MTN. Can I please just get the amount that I need to pay to end my relationship with this company.