Not actually Ebay-related but this seems like the place where the question is most likely to be answered!
I bought something online (not from Ebay) and used a gift voucher that didn't work, so the seller has refunded me the amount that wasn't taken off the bill in the first place. They refunded it yesterday, but the refund is showing as 'on hold' which I understand can happen if Paypal is waiting for the funds from the sellers bank account.
But, my whole account is now on hold. My balance is showing as £0 when I should have over £30, yet no payments have gone out. The refund was for £10, but the funds on hold are showing as "-£41" 
Whats that about?