You can pay 1k+1k per credit card through freecharge using debit card, no charge.
I use this trick every month -
first i paid 1 time 1k amount CC bill pay in my credit card.
then i login through chrome desktop web, create multiple chrome profile.
Now login all freecharge account through desktop website using different mobile numbers.
All freecharge accounts, i enter same credit card number and 1k bill pay.
Now enter debit card details on all freecharge account.
go to debit card otp page, enter otp but dnt submit,
go to another fc account and proceed to debit card otp page, enter otp but dnt submit.
again go to another fc account and proceed to debit card otp page, enter otp.
Now one by one click on submit option for all fc account.
Hurray, you paid same credit card number 1k bill multiple times using multiple freecharge account. 🤣🤣