FnF Settlement, Increment and Incentives

Hi, This is Supriya. I worked in MNC for almost 3-yrs and 5-months. Due to covid the appraisal happened a month before I resigned the job (October) as it use to happen in the month of July and amount gets settled. All the employees received Increment amount but I didn't. As asked they said as you have resigned so you won't receive it. I raised and asked I have the right to receive as an employee who contributed efforts over work for the months. But the reason the gave is totally invalid. Also while I was in 2-months Notice Period, for one month I got my Incentives with salary but the second month I didn't receive. For this also they gave the same reason that I am not eligible. I gave my Wifi-Slips too which I paid at the time of WFH they didn't respond for that too. Now its been 2-months since last day of working completing Notice Period. Still they didn't settle FnF Settlement too. What can I do for making these raise??? And over what I have rights to ask them for getting paid ???