We're sorry to hear about this situation. All in-game actions such as donations, deletions or general purchases are considered final, given that these require each player to manually confirm the process. Whilst these actions may sometimes be made accidentally, we sadly can't reverse some of those actions due to technical reasons. Some game purchases such as boosters or expansions are not reversible.
However, we are pleased to inform that on this particular occasion, we were able to make an exception and credited back -name of the currency- into your account.