Ted here from Shopify, thanks for posting your query!
When you open your account, what type of Shopify Payments banner are you seeing? Do any of the banners ask you to submit documentation such as this example? If so, please submit as much of the requested doc's into the banner and our Shopify Payments team will review everything in full.
If you don't see a banner, please contact our support so we can help authenticate your account and take a closer look. Our support can be contacted via our Help Centre, just click Support > Contact Support in the main menu for more info.
If there is anything else I can help you with, please let me know, I'm happy to help!