If you realise you won’t make the appointed time, notify the Provider immediately via the app. You may be able to reschedule if the Provider agrees, but that’s at their discretion. Remember, when you book, the Provider has set aside that time for you.
If you simply don’t show up and the Provider arrives and waits, this is considered a no-show on your part. In a no-show situation, the Provider is entitled to be paid in full while you forfeit that payment. You would not receive a refund, because the Provider’s time was wasted. Additionally, you’ll likely get a poor rating, and repeat no-shows could hurt your Campfire Score or even result in suspension.
If you know in advance you can’t attend, it’s much better to cancel the booking (with as much notice as possible) rather than to no-show. Cancelling at least 24 hours before the start time will get you a full refund. Cancelling later than that (e.g. a few hours before) usually means you won’t get a refund for the service fee, unless you have an approved valid reason or the Provider agrees to refund. While late cancellation isn’t great, it’s still better than not showing up at all.
If you’re just running a bit late, communicate. Providers will often accommodate a short delay if you keep them updated. They’re people too and understand things happen, but it’s crucial to keep them in the loop.