Poor network connection & client service

Sub-standard feedback in handling client queries, I am in a 5G area but having struggling with poor connection on their R479 unlimited package for 1 month and couple of weeks. Their IT always responded to citing that the problem has been resolved or will be resolved, I have forwarded numerous emails which they have rep**** but the is no progress. I have not received even a single courtesy call from them,and this is gusting as it affect most of my zoom meetings