Issue setting up iZettle card reader - link to Paypal account

Sorry if this is in the wrong place!
An iZettle machine has been donated to us, so I set up a Paypal account (not an easy task). They couldn’t seem to understand that we are non-profit, but not a charity so,to cut a long story short, they won’t allow me to link the iZettle with the account I’ve set up. I’ve provided them with our Constitution & a bank statement, but so far, no luck.