Vodacom poor service

Vodacom offered me a contract phone last year. I am not pleased with the service .I was suppose to pay R189 per month now im paying R320 and it’s not what we agreed on .I called them to request the recording’s and they told me I can get the recordings from the branch. I went to the branch and at the branch they were not able to assist me and they said I was suppose to get it from the the call center and the person I spoke to from the call center was lerato and mpho lerato was the rudest and than at the branch lebo said they couldn’t assist and she said I must phone them because on their side she can’t assist. I told the person who did the contract to not top up anything but they still did that is why I want the recordings