Purchased 366 keys from Jotos Bitcoin shop, which havent been sent out to my steam inventory.

Has been two hours since the purchase. It seems like this is also a common issue.

No response from the admins or anything. Especially when I bought it from the owner of the websites shop.

The keys was already sent on the day you purchased them, did you not received them already? Sometimes it may delay for a few hours after you bought them, but I cannot do very large scale changes to the source code to try to fix subtle problems right now because I don't have physical access to the hosting machines and I'm using hotel Wifi to try to maintain the hosting machines, and hotel Wifi in The Netherlands are not really fast enough for remote development to Asia.