Sorry, but I'm with thir on this one. Starting over again is clearly doomed, this character is never going to change so long as you are playing to her script. Behaviour that's rewarded is repeated, and so far you've done nothing but reward her childish irresponsibilities.

The only possible cure for her might, perhaps, be to give her the firm micro-managing Daddy-Domme she claims to want. Control her totally, no money of her own, online and phone time strictly limited and monitored, no leaving the house without permission (enforced by confiscating her clothes, and maybe by chains as well,) reporting back frequently and in verifiable detail when she's not under your eye, serious and consistent penalties for disobedience or neglecting her chores. It might be the saving of her, but it would be a lot of work, and there's no guarantee that she wouldn't just get more bratty and rebellious till you ran out of non-lethal punishments and gave up.

As it stands, this character reminds me painfully of my ex-slave, except that I only gave her two second chances before I pulled the plug, and that was one more than I should have. There were plausible excuses for the first fault, the second time I could see she was never going to change; but a misplaced sense of fairness made me offer her one last chance before I dropped the boom, and when she swore to do better, I was committed to waiting till she blew that chance. Luckily it only took a week, but that week did more harm than all her other tricks put together.