But if I was building this from a kit without a good component stash this could have been more frustrating.
Even though you got it sorted, it might be worth letting them know about the issue.
A new mob took over the business a couple of years ago, so maybe there's still teething problems (?).
I've only ever purchased knobs and switches from them with both previous and present owners. My first order after the change was very slow getting sent. Second order was much better.