I used to work for a bar in Sacramento, CA and was asked to help another bar owned by the same person. I was there for around 6 months and all my living expenses we paid by the owner. Now as soon as I returned to my place, I have started receiving a phone call regarding the apartment bill that has not been paid as of now. The owner was supposed to pay the bill which is $12000. Somehow my name has appeared on the lease document and now the collection agency is continuously threatening me to ruin my credit. What should I do?