Mileage is not guaranteed is their moto, be afraid

Bought a Volvo V40 from Ty One Auto on the 30th of September with the advertised mileage of 91 000km. After taking it for a service the following week, I was informed that the vehicle actually had close to 180 000km on it as it was last serviced on 177 000km. Informed the owner Tyrone of this, to which he rep**** I must check the invoice as they state mileage is not guaranteed, and that they will not be taking the vehicle back with a few threats along the way. Avoid the dealership if you do not want to go through the same case as I'm busy with now. 90 000km actually means +177 000km