Terrible service

I have a Webafrica MTN sim LTE package and for the past week, MTN has been less than helpful with the slow internet speed ticket logged. I work from home and down and upload speeds of less than 1mbps is really not allowing me to work efficiently. The APN has been rebooted on several occasions, the sim removed, the router iteself rebooted. I have changed the location of the router in my house, and that caused the speeds to be even less than before. Every time feedback is requested from MTN, it takes an additional 48hours for feedback. First MTN just advised that the sim was refreshed, when that didnt work, I was asked for my router make and model (HUAWEI Model B525s-65a) which is compatible, and I am still waiting for feedback. I AM UNABLE TO WORK, can this issue please be resolved as a matter of urgency. ***