Incorrect billing and take over fiasco from Nashua

the take over of my account from Nashua Mobile was a shamble, tried on several occasions to cancel deal. they **** on the telephone and refuse to draw the conversations. MTN did not respond to several emails(there email box was full) phones not answered call centre useless if you did find someone. went there in person. had to pay 4800 before they would even look at the incorrect account. they did not correct the problem, on an overseas trip was charged 15000k for a cel ph was in the Maldives no reception. on querying they said pay or the hand over. phones are now cut. loss of business, etc. was with Nashua for 18 years previously. this is an absolute scandal. when you go to there building in roodepoort you sit and wait for ages and get no response or assistance - your'e told to pay or else. cannot cancel or they will charge you even tho the take over was never done properly. they need to sort this account out or I will get my attorneys involved and sue for loss of business as well. they NEVER ANSWER THERE PHONES OR EMAILS...