Thanks to everyone who talked me into once again doing the vitamin-c treatment. This time I meticulously have followed all the instructions. I'm still adding about 4OZ of sequestrant each day and keeping my PH down to 7.2. Also, took Waterbear's advise and raised my CH, but it's taking a while to rise. I think it's around 240ppm now.
It took about 11 days for the free chlorine to finally hold. The pool is looking great, and I will post a picture of the results soon.
The question I have now:
Can I bring my PH back up to 7.4 or 7.5?
Is 4oz of sequestrant every day about right?