Bad service and promises from Vodacom

Due to the fact that i had gone over to another service supplier i cancelled my data contract with Vodacom. Unfortunately they switched off to early and i was left with no service to use for my security system. I contacted them and explained the problem, a very nice gentleman delt with me and said what they could do was give me special package just to the month to cover me, i also downgraded the old contrat to a small pack for R115.00 for me to travel with. This was done. At the end of the next month i was charged for both packages again. I contacted Vodacom and after 1 hour trying to explain the problem i was given a reference number EC-1M9K-ZNGJMG. I still after recieved 2 calls to say they were busy with the problem. I then received a call saying that they had gone over the recording of my conversation with the agent and he had given me an incorrect data package, and admitted the fault was theirs and they would credit me with the R865.00. this never happened so i expected it to be put to my account and put me in credit. But lo and behold they again have charged me for the incorrect amount of R865.00 again. I work and not take 1 hour at a time to sit and fight on the phone. This is the worst service have ever had from a cell company