What I do is I take the plant out of the pot and wash it top to bottom for a min or two to get most of the soil off and pesticides. Then repot it with clean fertilizer free soil
Definitely takes some time for a cham to settle in sometimes. If you interact with them or they are sick while they are adjusting you can stress them out and they may take longer to adjust.
My veiled baby took a month till she started eating like crazy
If it's digging it could be gravid. And the enclosure you mention doesn't sound real big. I'd get a larger enclosure. She will need one that is 2 ft wide, 2 ft deep and 4 ft tall when fully grown.
What I did for mine was invest in fruit fly cultures. If you buy 4-5 and alternate which ones you feed your cham daily you can make one culture last for a month. Also I found the larger fruit fly at petsmart and bred that in the same cultures as the smaller ones.
Currently building my own enclosure. Unfortunately it was suppose to be a father son project with my dad who already started before I told him what I was looking todo. Currently I think I may place a collecting pan underneath the entire cage in a cabinet and have it drain into a bucket I can...
It kind of makes it look natural in some areas, others I cut out to make a flatter surface. I also plan on add a little bit substrate around the background for color. Also some acrylic paint and finish it up by sealing it with some sealer