eBay help is at the top of every page
How do you mean they have put an 'item' on hold? (as per your comment)
An actual item, or a payment for an item? (as per your heading)
Were you asked by eBay to verify your ID/account recently?
If you believe they are up to no good, you certainly still have a whole heap of items listed
What would you like to know from other members?