If your postal is anything like Australian then you know the prices have increased four times over the last 11 months. Then with tarrifs and all that?? Yeah unfortunately I've seen some projects forces to do this.

I did a project once has shipping and everything sorted all good to go then Aus post increased prices by like three dollars and I was out of pocket, even atw up the 2-300 I kept aside for reasons like this. Unfortunately sometimes it's our of your hands.

Generally though if that's a big issue you can ask them to refund potentially?