First, Hi! I love your avatar.
Not to be a downer, but your Dad has a point. I strongly suspect that husbandry issues are behind your chameleon's problems. That would be "parenting"....
Sadly, he didn't help you find the information you needed. So, he does have to share that burden of blame.
I'm hoping you're spending time reading things here and realizing that taking your chameleon out for "Mom" time is not necessarily good for him (it might be good for you) and, Kinyonga and Sandra have given you excellent resources to help you fix the situation.
At this point, I think you need to look past "Dad" and try to get your pet's situation straightened out.
This board is a fabulous resource for it and you've already engaged some of the best experts in your story, so take advantage of that.