******* to pay R1500 for service

On the 21st of October 2015, I took my car for 75000km service to Hyundai Mokopane and i was told the car was no longer on service plan. And on the 4th of May 2016 i took it back for 90 000KM a lady by the name of Jeniffer told me that the car was still on service plan and it expires with the 90 000KM when i tried to explain that we were asked to pay the R1500.00 for the 75 000km how come and she told me that what she is doing for us now is a favour and actually the service plan is up to 60 000KM. I went through my service book and only to find out she is lying and the service plan it’s actually up to 90 000KM. Her Manager Verner told me there is nothing they can do and i need to call Hyundai SA and Hyundai SA referred me to Liquid Capital where i spoke to a lady by the name of Stephanie who told me that the cover has expired and there is nothing they can do to refund me my R1500. Hyundai Mokopane and Liquid capital are ******* i need my R1500 back please assist.