Should I hire a professional, or is a well-used phone enough?

No, a phone is not enough when the label has to be readable on the shop listing and on the wholesaler's. It works for an internal notice of the batch, and it stops working if that photo is the sales one. Make a phone test of the label and look at it at listing size. In Madrid the phone label cannot be read and the wholesaler asks for another. The sales listing carries the reference with a readable label.