This is messed up bro. After the bbps implementation with HDFC BANK you can't pay more than the bill generated amount and that too you can pay for just one time from third party apps
Example: If your bill amount is 10k then you can pay 10k for only one time from third party apps.
Regarding your case of 55 rupees due. Why don't you just choose hdfc netbanking or hdfc mobile app. You can pay the due amount from the app or netbanking.Now you can't do anything bro.
Email hdfc cc team and explain them about the whole situation. They will accept your mistake and correct your credit score