seller AJFourier ghosted me

AJFourier (https://modulargrid.net/e/users/view/64713) sold me 3 MFB modules, which where never sent. He completly ignores my messages but I saw some changes in his Marketplace Offers. I payed more then 300euros for those modules. Last message was on 25th of June:

Hey Daniel,
Great, just received:)
I will try to find a sturdy box for all 3 modules and try shipping it today, otherwise tomorrow latest.
I'll send you a tracking once shipped.
Have a great day!
AJ

After this he never replied to my messages again.

EDITED Yesterday, 12:54

In my experience some sellers can be quite slow on the replying and shipping front. It's nerve wracking and frustrating but I've learned to be patient, up to a point.

No update since 25th of June seems very bad to me though. I would be nervous. Maybe the seller is experiencing some kind of major crisis, it can happen, but if it was me I would go out of my way to at least keep the buyer updated on things...