ignore it, I had the same thing.
I just checked my paypal account and there has been no transactions in the last 90 days, as ratter said, do not click on any link go to the paypal website.
You have successfully made a payment of GBP 20.37 to Omnyex E commerce DMCC.
This transaction was made using your PayPal account (email address here) on 17/01/16 and the charge will appear on your account statement as a debit by: SKR*Skrill.com.
You have the legal right to cancel your order for items purchased through PayPal for 5 business days after the day you receive them.
Merchant Reference:
Order ID 12936194420
If you need help with this transaction please contact Omnyex E commerce DMCC.
Thank you
PayPal Customer Department
Dave.