Weird thing is, I didn't get a tracking number, just those vague 'this is where your package is now' emails. And I couldn't make any headway on their site. I'll give it another shot, see what happens...
it is not evident to navigate their site...
I had the same problem few weeks ago with a small chair i ordered but was never put in the mail...
Aliexpress reimbursed me...
Look attentively "order details"...