Refund for wrong purchase on the warehouse page

Hello, GGG! 
Because it's my first time playing Path of Exile 2 and I haven't played the first one before, I didn't even know that equipment trading was possible in this game before purchasing the warehouse. So I made a hasty purchase and spent all my 300 balance without thinking. If possible, GGG, could you give me a chance to get my 300 balance back that I accidentally spent? I want to use it to buy a trading warehouse.
thank you.