Do I have a case?

Bought used vehicle 7-15-20. The next morning we noticed the oil pressure gauge was at 25- 30%. We checked oil and looked for leaks, also the dashboard lights intermittently go out( so no night driving), On 7-18-20 after 1000 miles oil low light came on. We were 1000 miles from home. We found mechanic to fix oil seal and he notified us that there are 5 total engine sensors that need replacing, flex fuel knock sensors. Mechanic told us to take it to shop immediately when get local. That cost 780! Plus 4 nights in hotel. We called the GM before we fixed it. He told my husband that If we were in town he would look at it. Took to repair shop on Monday 7-24-20. 7Have phone calls and written confirmation of offers. They offered 250 then later in day on 7-29-20 they offered 780. The estimate to bring vehicle to safe standard was 3200 plus already spent 780. I told Josh 1500. He offered 780. Then offered to buy back. But vehicle is repaired. I did not receive a buyers guide either.