i was approved to sell a brand on amazon but its restricted

I opened a store a few days ago with the intentions of selling customized items. Amazon required me to prove I was authorized to sell that brand by submitting invoices from a wholesaler, which I happily and understandably did. It was approved, so I went through their steps to add the products and the only items i was able to connect to were unaltered items. I contacted support several times until I could find someone who would actually answer questions with an explanation instead of links to support pages. It turns out that its brand is restricted. Anyone know why this so and can explain it to me? Brand was Polar Camel btw.