Extremely POOR servoice

I recently upgraded 2 of my contracts with Vodacom. I discovered that there were 2 additional contracts that was added to my account. When I enquired, I was told that these were 2 data contracts, to which I never agreed to. 2 additional sim cards were issued for these contracts but here is the mind-blowing issue. The new handsets that were issues, is a single sim phone and not a double sim, so how the heck must I use this data then. I made multiple calls to Vodacom, and I have spoken to multiple people. Everyone promises to come back to me as this matter must be and will have an answer within 72 hours (3 days) I am now going for more than a week and my account has been debited already with incorrect amount. I have been loyal to Vodacom for more than a decade but now i am starting to regret my decisions. I am tired of constantly following up, empty promises and so on. The service at Vodacom, especially after sales, SUCKS.