tl;dr : Wiling to pay buyout but they are threatening with no relieving letter.
I work for an IT company, they have exploited in the name of onsite, made me work multiple weekends and sometimes even 15 hours a day work. I have decided to leave after getting a great opportunity when they realise I won't stay on false promises anymore they started harassing asking me to work my job as well as asked me to make sure I make my co worker "as good as me" (their words). New company want to buyout they are not letting me , this is the policy
"On confirmation, you will be required to give three months' notice or salary thereof in case
you decide to leave our services, subject to the Company's discretion. Where circumstances make it necessary,
the Company will have the discretion to relieve you only at the end of the three months' notice period.
Similarly, the Company can terminate your services by giving three months' notice or salary thereof."
Talking to HR is not an option as they are all in this cabal.
How do I proceed