Square Payment - NO test functionality

Will update the following issue as I can't delete a post so read with clarity at the bottom

After 20 minute chat with Square support that can only copy and paste answers an not actually answer a specific question I finally obtained the following

Me: How do I test Joomla/HikaShop in the Sandbox as provided. I have got to the payment page and looking for dummy card coordinates

Square Support: Currently, the only way to test your site’s checkout page is to test it out on your live website.
Start by setting up an online discount voucher for yourself for 100% off an item (or 99% if you’d like to be charged something minimal to understand the entire process), and then use that voucher to purchase something.
When finished, cancel the order, refund yourself if you were charged anything and unpublish your site.

Me: So there is no other way of Sandbox tessting

Square Support: The Sandbox is not for testing web sites such as you have supplied. It's the developers responsibility to provide a test bed for you.

Looks like I'm required to set up the site as a live one and use live card coordinates relating to a product with a $0.01 value and use their live gateway to test

EDIT
Just been given information from a mate relating to test cards and using the sand box which support person categorically denied was there.

Here is the link to the test card information the Support contact said wasn't available or able to be used.

I just did a test and yes it does work
Now to get other functionality working

Apologies for the clutter here.
While the Square system is nicer than others from a customer perspective and offers stuff that others don't I've had three support connections and each provided conflicting responses.