So I recently got my heater core replaced. I went to pick the car up and initially it struggled to start but it did indeed get started. While I was driving home, the engine sounded bogged down and the light on my dash were going on and off, my mileage would flash between the numbers and dashes, theft light was blinking and my needles were goin haywire or barely working at all. I got home and now the car won’t start. The only power I get to the car are these two lights on the dash. Any ideas?