Hi there samj91,
Regrettably there is no way to cancel a pending transaction, we can however place a limitation on your account with a case like this to ensure no action can be taken on your PayPal account including payments made.
If this has not been done I would advise that you call us by clicking on the contact us link at the bottom of any PayPal page and we can review your account further.
Hope this helps!
Siobhan
... View more