Wrong Payment

Dear Friends,
Since we are having 2 registrations in Tamil Nadu, we made payment of 2.5 crores yesterday to registration for which payment not required.

One registration is regular tax payer and we need to pay for this.

another one is ISD only for receipt of services and distribution of input credit purposes. no liability will come in this but we made wrongly for this.

being a huge amount it's very difficult to pay another challan and also govt not yet notified the refund claims till now.


Please suggest on this.