TELKOM - incorrectly suspending line and failing to respond to Dispute 4 days later

TELKOM has suspended my line after incorrectly billing me amounts that has nothing to do with my deal. I signed up for on one of their online specials in March 2020 (20 mbps FIBRE Home Unlimited at ZAR699.00 pm) - first 3 months FREE. Instead of the 3 months free, Telkom immediately started billing me and beginning of Amy when I enquired on why I am being billed via e-mail, nobody responded. Now,my line is suspended due to me not paying, but there is nothing due. Telkom has been billing me OVER R 1000 pm - nobody botheirng to explain or respond to my disputes. Finally, we are a household of 3 and all of us work and study from home due to lock-down - we have been rudely and unnecessarily disrupted by TELKOM. If this is not resolved by end-of business today, I will urgently refer this issue for investigation by the national consumer protector as well as the national credit protector.