If you have read the Donation Agreements you should already know that the money isn't given to the Owner. The money is used ON the servers, not for their own purposes. Which technically means: You will not get a refund.
I lost all my 1500 levels aswell, and I don't ask them to give me them all back. If you want your levels back, you need to wait for someone from the Owner/CO-Owner rank to reply with their answer.