Wix
Wix Stores
The catalog stays on the store. Card checkout opens on UGOpayme, then the order comes back paid.
Integrations/Wix/Setup
Keep the Wix store, theme, and catalog.
In Wix Stores, add an external checkout button that opens UGOpayme. Leave Wix Payments off this catalog.
Checkout opens on UGOpayme. Sandbox stays sandbox until this store is marked live.
The shopper pays with Visa or Mastercard. A signed webhook marks the order paid, then they return to your store.