Law / How to pay a drinking fine in Poland? [5]

Hi all, so I recently visited Poland, upon a night out I ended up drinking too much and fell asleep whilst outside.
The Police came along and put me into holding for the night, however upon release I was given an invoice of 299,98Zl but the invoice is in complete Polish and no English which is very confusing.

It was never explained to me how to pay or what it even meant as the language barrier wasn't very good. I am now back in the UK and have no idea where or how to pay this fine.

Any help would be very appreciated as I am not sure what to do and I do not want it to affect me when I next take a trip to Poland in the future.

Thanks in advance.

Jason