Uselss MTN service

We have been struggling with signal since June . We have sent email's and filled out the forms on line for help nobody contacted us, then on the 23rd of November and asked us to monitor the signal and he would contact us on the 30th again. Which he didn't , we phoned him on the 5th of December then he told me it was too late to do anything about it and he could only do something in the new year. We live on a plot where there is alot of burglaries recently and we struggle to communicate for assistance due to the signal.