Ok, well first step is to go to the
SilkroadOnline website and log in, once logged in, goto your
Charge History and have a look if the money has been charged onto your account.
If the charge is there and the silk isnt then youll need to raise a
Bug Report
If the charge isnt showing on that page but it is showing on paypal then i would suggest contacting paypal and asking their advice (when you log into paypal there is a link at the very bottem that says "contact us").
Hope this helps
FFGIRL