Amazon brand selling applications

Hi

I recently came across a good deal for a bulk buy of a branded product that sells well on amazon. I bought each product for £0.50 and it sells for £5 on amazon. However I need approval to sell the brand, and need to provide an invoice as some sort of proof. Is there any way around this as it was a quick deal and the wholesaler was unable to provide any documentation. They are legit products and not fakes