|One the way home last night i stopped to help a old man with a 280s mint looking. the car had just stopped and the bat was dead i gave it a jump and it died i figured it was the alternator so i let it sit for a while and charge the battery sp he could make it to the gas station. i gave the guy my number if hey ever wanted to sell the car well i got a call he says i ruined his alternator and that he wants me to pay or he will sue me. What should I do.