Had to email them again to ask them why my order was still not sent yet.

Sounds like, even though the order was no longer 'on hold' for the 'pre-order' items that were to be refunded, they didn't actually relocate my order into the 'ready to ship' category (or part of the warehouse). As such, they still hadn't shipped it yet... several days after they were going to refund and cancel the items they didn't have in stock.

So not only did they not think to contact a customer waiting 2 weeks for something that should have been in stock, but now needed that customer to remind them to actually ship the order.