1) what are terms of your appointment?
2) is there a clause that employee has to give 3 months notice ?
3) it is at the discretion of company to waive the notice period
4)company may refuse t give you relieving letter if you fail to fulfill terms of your contract
5) instead of legal notice go and meet the HR manager personally and request management to accept 3 months salary in lie of 3 months notice period
6)litigation is long drawn process