Who are 'they'?
Contact the seller, the link is on the listing at the right top, and explain your problem.
Since you have made one successful transaction, your Paypal account is probably fine.
But PP does have occasional short glitches. Usually these are over in a few moments. On Sunday nights they work very slowly while the system is upgraded.
It is also possible that the seller does not ship to Canada, which might prevent your payment from being accepted.
