[I accidentally bought too many lindens and it won't let me sell them back. What can I do?]

I wanted to buy some linden using Paypal's Pay it Later option, so when I bought the linden, it didn't go to paypal, but automatically withdrew the money from my account. I didn't want to use that money, and when I tried to sell the linden back, it wouldn't let me!

 

What can I do? I really need to get that money back.