Vodacom why are you abusing your customers like this?

Vodacom why? I even regret why I bought my cellphones with u!!! I received an email with a letter of demand I am given 21 days to settle da debt of an upgrade for a phone I never received for an upgrade I never even asked for nor signed for. In 2016 I opened da case it was investigated and da outcome was it was indeed *****. I was promised and assured the case was closed! 2 years down da line again dis case is up again. & dis tym it's even worse I'm told my name will be handed over to credit beaurea! Vodacom why???? Did I commit a sin by once being your customer??? Can someone do m a favor tell m what is really going on here! Vodacom I am tired, will I fight dis case for da rest of my life?