I am trying to create a+ content and when it says to select an ASIN I search my number and my brand comes up but the option to select it is greyed out and I cannot move to the next step... can anyone help?

I want to ship a pallet of goods using amazon partnered shipping. I checked my address was correct and made sure there was an email and a phone number present. I do not get any errors in steps 1 through 3 but when I get to step 4 to make the pallet labels all of the sudden the amazon partnered shipping gets greyed out. Everything is the same sku on the pallet. I was able to ship out individual boxes of product and that worked fine using the same shipping info. I tried to contact support but it seems like they just give me generic messages explaining how to check that there is not an address error. My case id is 16900822841. I'm sure others have run into this issue. Can anyone guide me on what to try? Thanks

thanks! when I open the contact buyer page, all reasons to contact are disabled