AICTE did not suspend the maintenance charges for those who have stayed at hostel premises at the time of lockdown. Even AICTE has released a prescribed continuation certificate in which there was specially mentioned for the students who stayed at the hostel. This is your college mistake, why they didn't mention on your continuation/promotion certificate that you stayed at the hostel at the time of lockdown.
Those students' promotion certificate has specially mentioned about their stay, has got the full amount of 50k.