If you wish we are happy to integrate "Charity Clear" with your Shopify store? DM me for more details.
We are a Shopify partner.
We can assist you integrate Cardstream as private gateway integration to your Shopify store. Even-though Cardstream is not listed as a public gateway, we can integrate them as a Private gateway for you. Only differences between private gateway and public gateway is that private gateways are only available to a single Shopify store once it is integrated.