Did you ever think duct tape would outlast fancy gear?

Had the exact same thing happen on a card I barely touched for like 8 months, they dropped me from 6k to 3k. Called twice and got nowhere, both reps gave me the same script about "account review." One thing that actually worked was stopping by a branch and talking to a banker in person, she put in some kind of note and my limit went back up about 3 months later. Low usage is the kiss of death with these banks, they want to see you swipe it and pay it off. If you go that route, put a small recurring bill on it like Netflix or gas and let it autopay, that keeps it active without you having to think about it.

Round 9 on a $250 logo means you're making like $8 an hour at this point. First thing, stop the free work. Send her an email saying "we've used the 2 included rounds, more changes are $50 each, want to keep going?" That usually snaps people out of it because now "make it pop" costs them money. Second, stop asking what she wants and start asking her to pick. Send 3 versions and say "reply with A, B, or C and I'll finish it up." Open ended feedback is how you end up on round 9. If she still won't choose, you bill for what you've done, hand over the files, and walk. A $250 client who eats 20 hours is not a client, it's a hobby.