Webafrica Terrible Service

I upgraded my wifi package from download speed of 40 mbps to 100 mbps. The download speed does not exceed 51 mbps at any given time, and according to a Webafrica agent, should be at least 80 mbps. The speed actually seems slower now than on the 40 mbps download package, yet I am paying more. I have been trying since 10th February to try and get this sorted via their w app number. Each time, a ticket is logged and when I query the status, the agent advises that the ticket has automatically been closed. I have requested a manager to contact me thrice, all to no avail. Two agents had promised that a technician would be sent out and yet again, I am still waiting. I am at my wits end as the problem remains unresolved.. Please help!!!