Sold a demo car that was not services

I bought a car in february 2024, i had and accident i reported in my insurance company they wanted all document including the service book , only to find there was nothing written on it but i was told the car has been service twice since it a demo , i asked them they said it a mistake on their side they will send me invoice showing that iwas serviced but also send invoice which was not sign no stamp , i said to them how will i nkow that the car indeed was service since ther is nothing that shows , i feel like physically it was not touched, i tried to speak to them yo do the service they refused , i asked for fotage showing the car service done in their work shop they said they dnt have. I feel like i was ****** the car was never done the services hence rhe services book is clean , they told me to go to any proton garage to check in system , i went to prton pmb, the system show nothing about my car , later they claimed that i should have gone to ford cmh the manager gave me wrong info. Pls helo me to expose them cos it look like they normally do that to females