Gratuity Matter Issue

I am a Public School teacher I had worked in a school(15/11/00 to 27/02/21) I resigned from my post on 15/01/2021 The CEO of the school assured to do FnF settlement with 45 days of leaving the job I claimed gratuity through form-I on 15/04/2021 as they failed their commitment. On 07/05/2021, they denied to pay the gratuity mentioning the reason that as you have resigned from your job I filed a case before the District Labor Commissioner on 19/09/2022. Every month they are extending the date and not submitting the Written Statement Today (05/04/2023), I got a letter from their Advocate to go for arbitration to settle the issue as per the service contract My Quarries: 1. Should I go for arbitration where I am not aware about the contract and my case is in the labour court? 2. Is the order of arbitration binding? 3. Is the arbitration valid to solve the gratuity matter? 4. I want a clear idea about the matter and to get maximum benefit out of it. Hope for your valuable suggestion