Cancel A***

I visited MTN stores twice in the last 2 months to cancel my contract. They refer one to call 808.<br> <br> I call 808 without success for hours during the week. I an hour already.am on the line today again for more than a hour already. No answer.<br> <br> I work and cannot go to MTN stores in working hours.<br> <br> I mailed (as per MTN website) for cancellation CustomerCare twice this month. They read and open the emails but do not reply.<br> <br> I don't know what to do anymore to cancel the above contract.