Sending a private message does to prove anything to eBay

Plus the buyer has not left you positive feedback

Was the QR code used as required?

If not, you can't prove anything was hand delivered 

Those things aside

You are a new seller and the funds will be on hold for 30 days as you are a new seller, no early release is likely, especially with no feedback

And that is IF

Assuming you fully completed sign up for Managed Payments and were verified to go ahead and start selling