MTN s%&*# WiFi speed

In Feb I took out a 30 Mbps monthly contract. As of Feb I have logged about 5 requests for assistance seeing as we don't even get 5 Mbps on the line. I have been sent from this department to that department and everytime they tell me I need to contact the coverage department. I HAVE, THEY CONFIRMED WE ARE IN THE RIGHT AREA, NO HILLS, NO BIG BUILDINGS AND WHAT HAVE YOU NOTS!!! I have complained about this line from get go!! I WANT OUT OF THIS USELESS CONTRACT MTN. from 19:00 in the evenings I cannot watch anything because it keeps loading! Please take this s%&## that you sold to me I don't want it anymore!!!