The terms & conditions, clauses expressed in both appointment letter, and bond need to be studied carefully. What are the grounds expressed for creating the bond?
Did you write to the good offices of your appointing authority, MD, stating as expressed in your appointment letter, bond you shall be imparted training for..................( say specialized training by certified institutions etc) but no training has been conducted and instead you are being made to sit in front of a computer, everyday from your date of joining i.e. for the last 2.5 months, and open internet connection everyday and read some documents on.....................which is no training at all. No one from company or any institution has ever come to train you and impart any kind of knowledge to you. You are worried since you are not learning any thing from any kind of training or any work done, and each time you have represented to Mr/Ms...........designation/dept............the bond which was got signed from you is flaunted at you to subdue you from making any representation and you do not see any future and your past education/qualification/experience shall go waste etc.
You could have at least expressed in your notice of resignation. You should built some record in your favor.
Employee should always consult elders in the family, competent and experienced well wishers, trained legal mind/lawyer before signing on documents and repenting later.
Now this company can approach your current/future employers and post adverse comments in reference check.
Company can proceed against you.
Has the company demanded Rs.90000/ verbally or by some letter/notice/email/legal notice. You shall need a local lawyer and may approach a competent and experienced service lawyer in person with all documents and arrange to send a befitting reply.