misguided

I bought a c class in 2020(4 years ago on 30 October) The salesperson told me that there is service warranty included in the price. She indicated that i qualify to bring my car for service up to 100 000 kilometers or 5years whichever comes first, and she further explained that i have allowance of 1000 excess on each service due for me to be covered by the warranty. when my car reached 100 000 i booked the service with Polokwane Mercurius , the same place i bought the car from and when i got there i was told that they will not cover the service because the km's are exceeded by 179 ( 100179). My day is really ruined today because i believed what i was told by the sales person. Now i have to source money for the service which i never budgeted for' because of excess of 179 kms while they made me believe i have excess of 1000 kms. im really hurt. i never experienced this when i bought my first car and i went back to buy the second car because i really thought they are truthful. Customers beware