Generative Fill Producing Inconsistent Results

Having a horrible time with the generative fill now that I paid for credits. The back story: I had tried removing wrinkles from a wedding dress in a shot last week using nano banana but it did some strange distorting of the subject and shifted the subject leaving weird bands around her. I tried a similar edit today with nano banana and this time it worked flawlessly! I tried it again on another shot. This time it said I had to buy credits to use the feature. Fair enough. If it was working this well now, it was worth it to me. So I bought 2,000 credits and tried again. It failed twice. No reason explained. I restarted photoshop. Tried again. This time it looked like it was working. Progress bar got close to 100%. Then I saw a message display breifly saying something about it was going to cost 10 credits. ok. But no result appeared. Tried again. Same thing. No results. Restarted photoshop again. This time it returned a horrible result. Similar to the time I used it last week. Distorted the model, cut subject from the background. Left weird bands around it. It looked like a total hack job. So is this as good as it gets? Hit and miss? Oh and I felt kind of scammed thinking I was paying for 2,000 credits when in all actuallity it was really only getting 200 credits for what I was planning to use it for. Do I have to add additional prompts saying "don't make it look amateurish?". This has been a horrible experience for which I had to pay extra for. Hopefully I can get a refund and revisit this feature once it gets a bit more refined. Right now, it is like beta software to me. No thanks. 😞 Why can't it work like the first time I tried it today? Was that a fluke?