Employer's Notice Period Demands
Only greedy businessmen would act like this. If an employer no longer requires your services, they can terminate you or ask you to resign. Now, when you do so, the employer demands notice pay, and that too for a 90-day notice period. This should not be allowed.
First of all, a notice period or paying in lieu of notice applies only to an employer who wishes to terminate an employee. An employee is not legally bound to give notice when they want to leave an employer. When the employer has already stated that your role is no longer required, they should accept the resignation and allow you to leave immediately.
If you say that you are withdrawing your resignation and are ready to be part of the organization, what would be their reaction? Will they allow you to work and pay your salary? Suppose you are ready to work for three months; will they be willing to pay your salary for that period? Then how can they demand you pay 75 days' salary? Are they going to sustain themselves with the money recovered from the employees? It is absurd.
Therefore, you should talk to this employer and inform them of the law, insisting on immediate release. If they are not agreeable, proceed legally against them.