Another minor point to this: while you did ask for an extension on paying, your message to her indicated that you wanted to wait a "few" days. The PayPal receipt shows that you took 8 days to pay. That's a little longer than a few. Most sellers would be a little upset if it took that long and there was no other communication. Just for future reference.

As for how to proceed, I think it would be prudent to wait for the seller's response here. Maybe you can work it out. 

This has to be the best henna custom I've seen. So well executed and the craftsmanship is superb.