Large new statement, no answers to queries

My MTN statement for a 3-gig ****le and handset went up from R797 to R1022 on 1 July, this despite my contract expiring on 22 June.

Twice I tried to contact MTN earlier in June to cancel my data ****le contract: the first tine I was told I couldn't be assisted because of massive IT problems on their side, and the second time I was told I couldn't cancel my contract until after 22 June.

When I tried to contact MTN yesterday to query my large new statement, I was on hold twice for 50 minutes without assitance from a 'service desk warrior'.

I'm out of pocket and there is no one to answer queries, how do you get help from MTN?