I'll jump straight into it, we have 'n' clients, "A", "B", "C", "D" and "E"...
We have a working solution and all is working great! Apart from client "E", I'm faced with a 402 - Payment Required response. To be honest the setup process is rather easy, create private app - leave default settings.
Now looking at shopify api documentation, it's states that the store is frozen, this is simply not true, as the store is still trading.
Obviously tested in our code base and postman, it seems it's store specific. Having contacted the client, and access given to the backend, absolutely nothing is out of place, all settings are the same as the other clients.
Any Shopify API guru's out there to help me diagnose the error/problem? To reiterate, I'm faced with a 402 - payment required response, any help is greatly appreciated.

