Vodacom contract ****

I took a contract with Vodacom in November 2022, which I am only supposed to pay R 399 per month. December, January and February I pad R 399 then I March they started charging me R 605 , I went to Vodacom in Ladysmith to ask for assistance for my account to be checked why I was charged extra, they then said it was something done telephonenically they can't help I must call *** ...I did I never got help up until today. Today on the 30th September I went to Vodacom in west street in Durban they also couldn't assist me ,they said the was a migration that was added to my account and they said I approved it ...when I asked for the voice record they couldn't assist me. What I am trying to say don't ever take Vodacom contracts they will **** you and not help you