BAD SERVICE MTN

I posted a complaint about no internet coverage by MTN at my house on this forum at the beginning of March and soon received a courtesy call from Veronica at MTN. The resulted in a email to me by MTN on 6/3 indicating that the tower in my area functions perfectly. I immediately responded, indicating that, despite the perfectly working tower, I still don't have internet coverage AT MY HOUSE and that the signal I have should be tested. I have received no response up to date and none of the options on the very elaborate voice prompts on the MTN line(***) leads to an option where I get access to an operator. I get told that I am barred from specific inquiries on my number by an electronic voice and get cut off. This forum thus appears to be the only way to get attention from MTN. At this rate, I'm not getting anywhere and Veronica's suggestion that I may be released from my rather expensive 3 service contracts if MTN cannot solve the problem is becoming very attractive. My MTN complaint no is 47838.