I recently took my 1995 Ford Escort wagon (150,000 miles) to a well known chain to have the battery replaced.
When they put installed the battery, they hooked it up backwards and blew the main fuse. When the main fuse was replaced and I was driving off I noticed that the charging light was on, and the radio/clock was not working. Taking it back, they confirmed that the alternator was dead and replaced it (with me paying for it). The radio still does not work and the tailgate light is blinking on-and-off.
I understand that attaching the battery incorrectly may blow the alternator, it seems way too much of a coincidence. I also understand that it may have affected the car's computers.
What recourse do I have with the company and more importantly what other possible damage could there be?