Hello there

See if you're not having the payment receipt of the payment that you've done then also you don't have to worry. Yes it's an important thing required in many domains. But your admission won't cancel if you don't have the receipt as it is  not the only one criteria to define that your admission is done are not. There are so many official documents are there. Even you can login to your account from bhu.online.in and there you'll find all the relevant proofs of yours.

I hope it helps you!

Thank you!