Selling people extra benefit with out telling about the installment

I have sign a tracking contract with the 2019 then October 2019 I received a call from one of their consultant telling me the benefits of having the services I was happy with everything that I was told end of November they deducted more than what we agreed on I called them and asked why did thy do thy they say all the benefits that I was told about I need to pay and extra cash for it I explained to the consultant that I was never told about the it n can I have a recording of which thy didn't provide me with February I received their call again n told them am not going to pay thm up until they provide that I didn't get an authorization from their consultant to reverse the money so now they jst called me to pay them R2790 I told them am not going to paying because they protecting their own staff out of my own money this people are ripping people off if they where write why not share the relevant information my credit record will be affected because of selfish people who don't do thier job please don't consider talking a tracker with mitrix the service it's very bad and they don't care about their customers