Damn! I got this error message too. As per error it is not about bill amount, it is related to number of credit cards on which the bill payment was done for this month via Paytm.
My total amount of bills for 5 CC in this month was 150K. So, nothing to do with 10K or any amount limit.
I paid for 5 credit cards' bills this month. How many credit cards' bill did you pay in this month?
Just trying to figure out the limit.