Forgot PIN don't know last top up value


I normally access app with Touch ID this option is not available ( since new iPhone screen fitted) I don’t know PIN.
Forgot option - When I enter phone number the next screen asks for last top up to exact cent- not topped up for months so can’t remember and top up in GBP. How do I get into my account.?


Hi, I have the same issue. Does anyone know how to recover from this situation?