Telkom internet ssles

Registered for internet in December 2019. Have not had any internet. Was told by consultants that I used all my data in one day. Reported it but was just told I used data and nothing could be done. I was given a number to phone which does not work. January 2020 I was told again I used all my data in 1 day (40GB), which is impossible as I was at work. I am being billed for a service which I never could use. When I go to Telkom office, I am made out a lier and receive no assistance.