I think you need a source of PREformed A, as many sources believe that a chameleon is incapable of converting beta carotene into a useable form. Repashy plus is popular, but as Kinyonga stated, too much is dangerous, so use it once every other week, lightly.
You need a calcium product without D3 and Repcal, Repashy, or Sticky Tongue Farms Indoor formula are all reputable, and a calcium with D3. I like Repashy LoD given every other week.
Your schedule should be similar to:
Week 1 : Plain calcium 2-3 days a week and vitamins one day a week
Week 2 : Plain calcium 3-4 times a week and calcium with D3 on day a week
Week 3 : Repeat week 1
Week 4 : Repeat week 2
Use a good gutload, review the many threads on gutloading, but using the search feature, and if you have and adult male, reduce Calcium to 2-3 times a week, once he's an adult, but keep everything else the same. Adult females should continue to get 3 days of plain calcium per week and everything else the same.