I ordered from the slackstore and received my copy last month as well. About ten days after release. I haven't heard anything concerning the subscription type orders if they have been shipped as yet.
I would suggest you check if your credit card was billed, if so then you may want to call Slackware concerning the order. If not, then you may want to call first and/or consider reordering. They also have an email address
sales@store.slackware.com that you might want to also consider using.
