My teugelsi didn't eat for the first 2 days either, just explored and sniffed around every level of the tank. Turned her nose up at pellets, despite me watching her eat tetra color bits of all things in the lfs, which worried me as well. 3rd night she took basa chunks, later tilapia, now homemade gel food. It's been 3 weeks and she comes poking around the front of the tank as soon as lights go out and tucks right in. She likes it dim - with only ambient light from the other tanks.
Perhaps I missed it, but have you tried feeding with lights out?
Edit: Once again, Polyaddict 86 and I have the same response, lol.
O