VODACOM PATHETIC CUSTOMER SERVICE

I was called by 1 of Vodacom's agents for a migration on my price plan (to pay more) I did not agree to it but however my contract was migrated to a new Price plan and I now have to pay R1700 on a monthly bases. I have been calling vodacom customer care/new upgrades/migration departments with no luck and have been spending hours on the phone trying to get assistance and always told that the issue was escalated but I keep on getting high bills and no one wants to assist.