Very poor service and speed after upgrade

Good Day

3 weeks ago I ugraded my line from 100mbps to 400mbps. The speed was upgraded on the dashboard, but my speed remained 90mbps. Fault has been escalated numerous times and after 3 weeks the ticked is closed and resolved!!!!!!!!! I did do a speed test after webafrica closed my technical fault issue report and still only receive 90mbps instead of 400mbps.

How do you close a ticket as resolved when the problem still persist? No communication from technical, no communication from any manager after I asked numerous times that a manager contact me asap. This speed issue must be resolved asap or cancel my service with immediate effect and refund my money.

Hopefully I will receive communication back.

Thanks