Ordering items that come from the manufacturer, I e camshafts

There is a longer waiting times for many parts due to the pandemic. Call and ask if the part is on hand for everything.
I did, after they verbally acknowledged it was on hand I asked again, “ how do you know?” They had no clue what they have and have no clue how to verify what they have. Kinda curious as to how they keep in business.

they incidentally lied to me because their computer said it was on hand, and refused to bother with me by verifying their stock that is within their warehouse.