Very Bad Signal

We moved into a new house a while ago and only then discovered that the signal is very poor. I phoned MTN to log a query in this regard. They told me to phone them the following day from the house to check the signal. So today I phoned Mtn and spoke to a consultant about the problem. The problem is that I do not have good signal and my contract with Mtn is expiring on the 1st of May 2016. So I must decide do I want to upgrade or cancel my contract with Mtn. The consultant told me that they cant do anything because they must follow protocol and I do understand that, but this situation is quite different because I cant wait 3 months up to 3 years to resolve this problem without quality signal. The signal is so poor that I only receive a notification via sms that I had a miscall, do not even receive whatsup messages and more than 98% cant phone anyone. It didn't even bother the consultant when I asked him if Mtn don't care about their clients and that it is okay with them to lose clients? His answer I cant help you. I have been with Mtn for 4 years now never made a late payment and this is what we as loyal clients receive?