Bought asset on the asset store and now cannot download it

I think its an error with the payment with paypal. if the money have not been taked, that mean you need to make a new transaction

no no the money has been taken out of my account

contact Unity directly... better question for their support staff... never had this issue myself but I'd be frusterated too... just an fyi if this is your first time: when you purchas it you should go back to the asset you wanted to purchase and it should provide you with a link to import your asset into your current project. If not, contact Unity.