Telkom is a waste of Money

I have a 10Mbps line with Telkom. For a number of days now I am running at 0.91 and less. This is unacceptable as I am currently working from home during Lockdown. I can get nothing done as everything just buffers. I have sent numerous messages and all they say is that my complaint has been forwarded to their Technical department - up until now no one has even bothered calling or responding - I am sick and tired of Telkom. What can I do to get this line up and running soon? Thank you, Susan