Roshni,
Sorry to be direct but from your reports it looks to be either of 3 things:-
1. Husband is involved in extra-marital affair and is not interested in you.
2. Husband is an emotionless selfish guy and so looks to be his family.
3. both 1. and 2.
Either of the 3 choices are extremely extremely bad for your future. The way his family is treating you (locking you up etc) amounts to DV and/or cruelty of the highest order.
Advice you to take your parents help and file multiple cases against Husband and his family against as per Indian laws. (First go away to your parents house as soon as possible).