In March 2019 I purchased a 2018 Honda Accord spor...

In March 2019 I purchased a 2018 Honda Accord sport and was offered free State inspection for the life of the vehicle along with free car washes .Today Is March 13 2020 and I was told that they weren t gonna honor the deal I m totally disgusted the oil change light remain on 30% was still on after oil change .How do I know the oil was really even changed .