Had a warranty on a truck I bought from this deale...

Had a warranty on a truck I bought from this dealership. Said at first was a oil pressure sensor and was not covered in my power train warranty Bc it was considered an electrical component. After swapping it and not fixing the problem said it was actually the oil pump and was covered under my warranty. But I still had to pay The same amount. Also changed radiator cap...not a big deal but not sure what it has to do with oil? When asked about everything was told they have a checklist and they have to go down the line. Personally I feel as though this dealership has gone downhill some and have a few scam artists working now. I understand this is during a worldwide crisis and sales might have declined, but scamming people is not the right way to make money.