Ford Menlyn deals ********* with their customers

I booked my car's 60 000km service in February 2020 at Ford Menlyn. I was told by the service department that even though the service book showed R60 000km, I should only bring the car back at 80 000km or September, which ever one came first. I booked my 80 000km at Lazarus Ford in Centurion, and they said my service plan expired at 60 000km, which means I have to pay for the service myself. That is R5500.00 that I did not bargain on and I find what they did *********.