SBI — Calling me using some bank name

Address:

Mumbai City, Maharashtra

A lady calling from the number [protected] on 13th may 2014 12.38 P.M.me and telling me that you are guarantor of Rs. 2 Lacs loan amount and you have to pay or else we will make you pay by doing some heavy damage to me etc. When I called back to same number she replied but not confidently and said that she is calling from SBI Mumbai and not given me the exact address and she cut the call and told me that she will call back me within 30 minutes, but she doesn't call back me yet.