Don't move to MTN bad service indifference

I live and work in central Sandton. For various reasons I took up a second line at MTN with one line at Vodacom as a member of their VIP list. There is no signal in my home - calls are dropped and break up. I contacted the technical call centre to report the issue hoping the issue could be addressed and had the negative experience of indifference and bad service from MTN - I was told there was a 10 working day turnaround in reverting back to me - which has now elapsed and not been resolved. The signal quality in Sandton is bad and many many calls are dropped! Vodacom was not half as bad.I should have known MTN and having a line with them would be a mistake - the service in the Hyde Park branch was dismal and things haven't improved since then...