BAD SERVICE AND NO FOLLOW UP ALL AT CUSTUMERS COST.

I app**** for Fiber connection in Sept 2020 at my private residence in Somerset West, Vodacom was quick to give me a contract. I explained that there was a connection point, as previous tended had Fiber, gave the "B" code, they send me a LTA connection within 3 working days, to be followed by the Fiber connection within 21 working days, THAT never happened,, in November I cancelled because nothing was done at my place, but Vodacom send me a "COMPLETE mail" and asked me to rate the service, I gave a "0" as with a note that said JOB NOT DONE,,, after phoning & sending mails NO replay, BUT until end of January they deduct my Fiber rental, PLEASE how do I stop that and get my money back ??? I got service within 21 days from Sell C