Yellow Peril explains to us why you should communicate with your vendor.

Here.  All that the client had to do here was to dash a quick Hi, thanks for getting that project to us in time for our meeting at such short notice. If you don’t hear back from us in two weeks, give us a call and then there wouldn’t have been a problem*. Because while the customer may be always right, the customer should also always be nice. Niceness, like her brother Politeness, costs nothing.

Moe Lane

*It would have also have lit a fire on the decision-making process on the client’s side, too. If it takes somebody two weeks to get back to you without prodding, they probably would have been able to get back to you within a week. Deadlines can be helpful.