gaaahhhh!
Imagine! SL thinks you are so very careful about allowing items to get into your inventory. You say, "No, I really can't possibly accept that item I just paid 3K lindens for ... I must, in conscience, decline it." Right! Why do we even have the option to decline something that we have just bought?
Sometimes when I go to the KC shop i turn on "auto-accept inventory items offered," like at times when they are offering a free special kitten and you only get one crack at it, or where there is a lot of traffic, or for the advent calendar. I did auto-accept a few times after accidentally declining a purchased item.
Vendors can work different ways ("You Paid XYZ X number of Lindens for product X" and it goes right into inventoriy, or "XYZ is offering you Product X. Accept?") It's a difference betwee vendors saying "Buy" and vendors saying "Pay." The "Buy" vendors are a lot simpler. The "Pay" vendors are scripted, and enable the sellers to gather a lot more information and do more with the transaction. But the pay-vendors are the screwup vendors. Not much can be done about it.
Luckily for us, KittyCats has absolutely superb!! customer support. We are safe from harm
Kitties stay happy
So ... my sympathies! after all that shoppin', getting "malled" at the mall, now this. Here, have a hot cocoa and some soft music ...