Please check your employment order for separation clause.
Did you asked them to terminate you in writing. Your post is not clear.
If not then you can file a case. Hope you have handed over company belongings issued to you at the time of joining. Else Company turn the case differently.
3rd June 2019 From India, Madras
With the designation and the predominant responsibilities attached to the position of your job, I think you are not a " workman" under the ID Act,1947. Therefore, the remedy for the problem can be from the terms of your contract of employment only.
But, unfortunately your post seems a bit confusing to me. The cause of action for the termination arises from your resignation. In that case that you have to give three months notice before the effective date of resignation or pay the salary in lieu thereof. If you have exercised the option of actually serving the entire notice period which was not acceptable to the employer and he wanted to modify your offer by relieving you earlier, then the employer has to pay notice salary to you. When you refused it, how can the employer simply terminate you without any other valid reason?
3rd June 2019 From India, Salem