Upset customer

I'd just like to vent my frustration at one of your salesman(Joe Swart). He sold me a Renault stepway last year, everything was fine, until I had to do my first car service. He claimed the car was serviced, brakes were replaced etc. Unfortunately now that I'm claiming my 75000km service, they say the 60000km didn't happen. There's nothing in the record book and nothing on the system. Im sitting with a major engine problem now and the maintenance plan won't cover it fully because of this missing service. Now I have to pay out of pocket, because this salesman ****. Very, very disappointed and upset with this lack of care towards your clients. He also owes me a spare key, this was never brought up again by him.