Lack of assistance in signal issue

I called in on the 9th of April to report poor cellphone reception in our area and was told someone would come out for a review within 96 hours. After a week tried to call and follow up but got a person that was very unwilling to listen to reason and kept bringing up a old report from 3 years ago that was resolved. I moved in not so long ago and realized that none of the phones had proper reception where as I phoned and asked if a repeater of some sorts can be supp**** from MTN to boost our cellphone reception throughout the house. Seeming that we have no reception in certain areas of the inside of the house and poor signals in other areas which causes calls to drop or cut out to the extend of not hearing any of the conversation at times and it is not always possible to run outside to try and catch a signal due to security risk. We have had an incident on the 30th April where one of the occupants fell and got injured and was not able to contact anyone for help due to no network coverage in the house . Upon many calls and asking I was told on the 4th of May that it would be escalated and I would be contacted so someone can come and assist but have had once again no return call.