Your loan EMI due date depends on the lender.
For IDFC FIRST Bank, ABFL, and Groww CreditServ, it's the 5th of each month. For Credit Saison India, it's the 3rd.
EMIs are auto-deducted, so ensure your account has funds between the 1st and 8th. You can pre-pay your EMI on the Groww app for all lenders except Credit Saison India, using net banking or UPI.