Vodacom robs their loyal clients!

So in 2019 i upgraded my my contract with vodacom and recieved a free phone. The sales person told me that i am getting a simcard with the free phone. I told him i so not wish to activate it as i was planning to sell the phone. I never used the sim card. End Jan 2021 my bill shows up and there is an extra R65 added to the bill. I contacted them and asked about it. NONE of their departments are able to give me a consistant reason for the R65. I have proof where one consulted responded in writing on Messenger that it was free till end December 2020 and that im not being charged for it. The other one in the same conversation says i cannot cancel as this contract now ends in May, and that I will be charged a penalty for cancelling. My bill shows i owe R178.99 on one contract and R206 on my other contract. But the amount owed is R478 and the date for R478 shows for December on my BILL SO FAR on the App. Vodacom refuses to sort the confusion out. I have so many names of consultants that cannot help me. They have been lying to me.