Bad customer services

I have lodged a query with MTN since the day I received an invoice reflecting an insurance premium of R318 which was sold to me under false presence that the premium would only go off at the end of October. I've followed up on this since the 7th of September when I received this invoice and gave them all the details where their consultant **** blatantly to me on the phone. Gave them the date and time of call received as well as the duration of call as they claim their calls are being recorded. Last Friday I followed up again and spoke to a woman call Hutchinson who promised to get to the bottom of this and provide me with feedback yesterday to which none of that happened. For the amount I'm paying MTN I would think they would take my business seriously but clearly MTN customer service will never change..I regret taking up a new contract with them with the caliber of stuff running their customer department l. Stay away from MTN...