Accidentaly donated 2 times

[vojooo]

I wanted to donate 10 euros to enter without waiting for queue.... and i made an account on payment wall and i saw this... because it said my card isnt accepted.... what now ?! I am using my card all the time and it is active and has money on it, but when i tried to donate it says it is invalid... and now it says 20 coins = 20 euros are initiated....? What to do...?
https://imgur.com/a/12Mg7