Puma Watch Strap Pin broken?

I have a Red & Black Puma Fluctuation (Active Collection). There is a pin which holds the strap into the the watch head, but it seems that around one of the pin's lodging holes (what the pin goes into), the plastic has become a bit deformed and scratched, meaning the pin slides straight out. Are there any ways of fixing this and how much do you think this will cost to repair?