NHTSA Complaint #11616445 — 2007 DODGE RAM 1500

I purchased my 2007 Dodge Ram 1500 truck around May 2022 at a used car lot. It had low mileage so I thought I did great. Immediately after I brought it home, it began to die. I figured it had a really old battery so I purchased a new one. This one would last around 3 days instead of the one day before dying. I would drive it and jump it over and over. I tried to contact the dealer over and over but they would not respond to my calls. I wrote a terrible review about them in Yelp and they contacted me immediately, but when I attempted to schedule a time to drop the truck back off, they stopped responding again. About 9 months later the truck stopped turning over all together. We found that the fuel pump was the issue. It sat for a year until I had it towed to the mechanic, who fixed the fuel pump, but found that the car would only run for a few seconds. He continued to diagnose it, and after weeks, he tells me that there is something terribly faulty with the electrical system, but he is stumped as to what it is. He says he does not see where anyone has tampered with the system at all, but there is something mysterious about the electrical component. I have put so much money into this truck including having to pay insurance and a high monthly payment for a dead truck. Please help me. I can provide documents after I meet with mechanic who still has truck.