Vodacom charging me for contract I did not take

I have been charged for fibre which I did not take out for the last 5 months, no one can assist and kept get pushed from pillar to post, i have not signed for a new contract nor is their any call recordings, my bill is paid on time yet we we need assistance Vodacom cannot help. This is not customer service and Vodacom is basically *****ing money from me.