As you are saying that your confirmation was due at the end of march. Then did you received any perks or benefits given to confirmed employee.
In the portal when you applied for resignation was it showing your status as probationer , do you have print of that.
Did they confirmed you in writing and did you accept the letter of confirmation.
Last and important, Are you a confirmed employee or not?
First answer this questions then i would be able to tell you what you can do.
Thanks for helping out.
There is nowhere mentioned anything about extra perks for an employee on probation & confirmed employee.
In the portal, my probation application was showing as pending when I resigned. There is no option to take a print out of that, but I have screenshot in which the confirmation date is mentioned as 8 August (i.e 9 days after I resigned).
So, as per the system now, I am confirmed employee. But as per the date I have resgined, I was still on probation. The HR team intentionally confirmed it after my resignation to make me serve 2 months. It was actually supposed to be done around 1.4 years back.
Please take up the matter to your higher authorities very submissively before talking legal.
All the Best