Hertz - Reservation in Poland - Changed EUR to PLN but value still same

I made a booking a while ago for a rental in Poland. At the time it reserved for ~800 EUR. Today I was looking at the reservation and it says it will be ~800 PLN. Right now 1 EUR = ~4.25 PLN, so that's a 75%+ discount. I "modified" the reservation by changing nothing and I got an email with the 800 PLN price again. Will Hertz honour this "new" price, or will I still be charged in EUR in the end?

Check the rate on the slip when you pick up the car, if it is not for 800pln then show them your confirmation,they can't argue with it. It is also quite possible the the rate has gone down a lot as the rental date nears and they have too many cars