Vodacom Lies About Contract Upgrade

Last week Vodacom phoned me to change my current contract. I made a deal, my phone was delivered at the end of last week. This morning when I checked I did not have an unlimited plan which was what we agreed upon. After holding on the line for about 20min, the lady said I must cancel then they will collect the device and I would have to take out a contract again. I asked if they would refund me the amount I had to spend on a screen protector and a cover. She said no. She insisted that I hold onto the line to transfer me to another department. I held on and the line cut out after 30 min. I tried again and again and the line will just cut after holding on for 10min. If this is the case I will gladly cancel my contract together with my other devices and go to another service provider.