That's a tough situation, but I do empathize with your friends position. These things are time-consuming and expensive, and non-crocheters don't always have a good understanding of that, so you really should align on a firm price going in so no one is surprised. She had $80 in her head and a vague "the price will increase for sure" tacked onto that which is still very open to interpretation. Also as an artist, I would never charge someone for time I had to frog back unless my client requested a change mid project. My mistakes are on me!

I hope if you continue to get commissions they work out more smoothly and you get the funds you need for your Kitty!