If someone sets a self-imposed punishment to stop committing a sin, such as donating a certain amount for every lie they tell, what happens if they are unable to fulfill this punishment?
Bismihi ta'ala
This would depend on the method of how it was set. Was it a vow, recited in the shar'i formula, or not?
If it was a vow, your father is able to release you from it. Please refer to detailed Ahkam books for further explanation.
And Allah knows best