Given a Wrong Calling Plan

Around the 08/10/2015 I app**** for an upgrade from prepaid to a contract with a BlackBerry Leap that I saw on their website that will be in minutes with the monthly subscription of either R249 or R269 P/M. They gave me the number 082145 to call when I am ready to activate the contract as I've asked what will happen to the current airtime post migration, they said it will be forfeited. I decided I will finish the current airtime first then activate. I was surprised when R246 was debited on my bank account on 16/10/2015 before activation. The SIM swap was done 26/10/2015. When I checked the balance on 27/10/2015, expecting the prorated monthly airtime for the new contract, I was surprised with the balance of less than R3. I connected to their website hoping to see the call history, to my surprise I am on the calling plan uchoose R150, which is not what I requested. They can't send me their recording which will prove the plan I told the person when I called. They only tell me about the terms and conditions which the person read to me. Why can't they provide me the full recording. They are selective. I am not happy with their service. They say I can only change plan after 3 months.