How long should it take to receive my Invisalign Vivera retainer?

The dental assistant did both a 3D scan of my teeth and an impression for the temporary retaIners. The temporary one hurt my teeth I think because when she did my impression the stuff was a lot more liquidy than usual. I was told it would only take a couple days to get my Invisalign retainers so I decided to wait without wearing my retainers. I called a week later and was told it would be 2 to 3 wks. Called again and was told 5 to 6 wks. Now it has been 9 wks. Does it really take that long?