Http 500 server error, challan not generated on successful payment of income tax

[NikhilG]

Two of my transactions to income tax payments went through money debited but it gave server error while generating Challan.
It shows in payment initiated, will they generate Challan later? Or refund my amount.
If they generate Challan later, what m I gonna do with that because I have submitted my return via adjusting my savings.