Persisting in Wrong Billing and TOTAL time wasting

I had a cell contract through Nashua since 1996 and it was all trouble-free, good and prompth overall service.<br> Since October 2014 when the account was ceded to MTN directly, I immediately started to experience persisting billing problems, despite of hours of concersations and visits to Customer Care outlets, even at the Head Office.<br> <br> It looks like the whole MTN Service is RUN BY DUMB COMPUTERS (which never take any human instructions according to merit!)<br> <br> First billing mistake was manually fixed in December, but in January and February it appeared again!<br> On 10 February we visited Reception 2 for requesting cancellation of contract due to service failures from MTN - no feedback received from attending official<br> On 11 February - again - 1 hour waiting at Reception 2 for billing inquiry and dispute, after that attended by official who promised to work on the issue and give us feedback - NOTHING up to now!<br> WE POSSESS DETAILED NOTES FOR ALL TIMES, NAMES AND DEVELOPMENTS REGARING THIS ISSUE.<br> <br> Numerous emails were send to Customer Care, Credit Contrrollers etc., but unfortunately no practical developments were seen up to now.<br> The Contract will be cancelled due to failure of MTN