Poor customer service

On the 26th of February 2018 I completed a network coverage form because we have been struggling with our MTN signal where we stay from November. I received an email back with reference number ********** 3. Someone phoned to say that they will come and install a signal booster at our house but they will be in contact again. Since then I have sent numerous emails just getting a response that my query has been escalated to Lucky for assistance. On the 12th of June I sent an email again saying that nothing has happen yet, and I was told that they will be in contact with me shortly. Yesterday I phoned the network coverage department and I was told that they will phone me back they just want to talk to their manager or someone, I have heard nothing yet. I am getting fed up with this poor service and no one getting back to me. It can't possibly take up to 4 months to get a signal booster installed. We have been loyal MTN customers for a few years but this in unacceptable. We consider getting a MTN data contract as well when the signal booster was installed but we are looking for other options now as we don't receive the service we need from MTN.