youre still doing the daily soaks? Sounds like it's torpid. no snotty nasal discharge?
Do you have a heating pad at home? If you do, get a plastic bowl, put the tort in the bowl with about 2" of damp (but not super moist) substrate under it. Put the bowl on the heating pad and cover with a towel. Get the substrate up to about 80F and hold it as close to that as you can for a couple hours. See if your little one perks up. Put some drinking water in there too and if it wakes up, offer some mazuri as a mash. (consistency of sausage gravy). See where it goes from there. Do you have an exotic vet in your area that does reptiles?