No cell phone coverage in store to run business

We opened our shop in the Mall of the South and has NO MTN cellphone coverage inside the store - thus not 1 of our FOUR contracts we have with MTN are working. We are at the shop from 9:00am to 19:00pm daily and can not use the service we are paying for. <br> <br> This has a tremendous effect on our communication with our clients.<br> <br> After logging many complaints MTN has refused to give us any feedback as to what can be done to fix the problem. We are now being told that we should wait till next year for them to tend to the complaint. No correspondence from MTN, no phone calls or follow up emails.<br> <br> This has been a persisting problem since 1 October 2015. The complaint has allegedly been escalated to a manager but they refuse to give any contact info or email address for this person. <br> <br> It just shows the total disregard that MTN has for their paying customers. and it seems that they are have no problem taking money for a service they are not delivering!They expect their clients to contact them daily to follow up on progress of complaints and does not even have the respect to give a paying customer a courtesy phone call.<br> <br> Or perhaps the MTN branch at Mall of the South needs better training!!