Personal agenda to pass the repair as driver abuse

I had a 30000 km service with them where they were asked and confirmed that all was well with the vehicle including the brakes. After 6000 km the one brake pad out of 4 in the rear was completely worn but the other 3 was still usable. They invoiced me and I asked if this was not a factory fault and graham confirmed that he will follow up and refund me. After waiting 4 working days and not hearing anything from him we reported the matter to Honda SA. They gave us feedback and said that the workshop manager said it was driver abuse and they would not honour the claim. I made an appointment with Kobus the DP, and Graham saw me make the appointment and covered himself with a story to Kobus. I was given an appointment after Graham argued confirmed he was angry because I took it to Honda SA. The technician then confirmed that there was indeed a problem with the installation on that brake pad and it should have been a warranty claim. I got the letter before Graham could intervene and he then asked me not to go to Honda SA he will handle it. Later that week they phoned me and said again they will not honour the claim. I will never service or buy another vehicle from Honda Polokwane again