Telkom Post Sales Customer Service is Disgusting

I have a Fibre line at home. I initially had it at 10mps. I got a cold call from Telkom to upgrade to 20mps for a small increase in monthly premiums.

After this upgrade, my line hasn't worked as well as it worked at 10mps.

I have tried to get my serviced fixed with servaral calls to their call centre and I have been to their stores around Joburg about 5 times in the past month. The service I have recieved is disgusting.

Telkom has the worst customer service I have recieved.