No effort to fix connectivity issue

Have not been able to make or receive calls from my office for 3 months. Have reported it multiple times with more than one sections/departments. I have to follow up EVERY TIME for feedback. Have not received any feedback for the last two weeks even after asking for an update. So I am basically being ignored and MTN is not taking my issue seriously. I'm busy at work and can't constantly follow up. THREE MONTHS... This is unacceptable customer service.