I purchased a for 44m, I cant work out how to activate it thanks

Just lock it in your inventory. It activates automatically.

It works on its own just by being in the inventory, also note that the discount does stack with the temporary shop discount buff that you sometimes get.

More importantly, it only works in the main shops as described... not in user shops. That may be causing a bit of confusion as well, so I figured I'd mention!

Your main shop discount buff gave you 15% (750 sP) off the main price!,

Its locked in my inventory, Im only getting the %15 buff, Will wait to see if it kicks in thanks

I recommend filing a ticket. It should work in the main shops on your very first purchase once it's in tour inventory.

You should get a message similar to this:

I see you have a discount card! I'll give you a discounted price of 1,317 sP! Ghostly Sword has been added to your inventory.

I think it should stack with the 15% buff, but it's not very clear because if you have the buff active and the card in your inventory, then it will only give you the message about one of them (but the sP amount will include the discount for both). That's probably what's causing the confusion.

Hmmm, The message always includes both discounts for me. Like below;

All good I realize now 'shy face' I thought it was like the %15 buff, Thanks for the help

This discount card is an old old old part of Subeta so it's part of the purchase coding. The random buff is new for about three years now, and is a replacement for the haggle discount, so it is tacked on underneath.