Female Leopard gecko, Lady

Hello, I typically own arachnids and scorpions and what not however having young kids I wanted to introduce new genres of pets and have had NO LUCK. I don't know why, but our pet mouse would absolutely not eat and died after having it for a week, I then acquired a frog which shortly after buying it, died (no idea why the humidity was absolutely perfect as per requirements)... I have bought a leopard gecko named lady three weeks ago and since I bought her (pet store staff say she ate 5 worms a day) SHE WONT EAT. IM SERIOUS lmao. I'm scared I don't want her to die, I've owned the 180 gallon tank for months now but feel it should go with the gecko.

The gecko is a firm 80$, with the 180gal tank, heating pads, lamp, hide outs, calcium powder, and drops for water is 450$ which is OBO (tank was 230$ alone)

Prefer pickup if you're taking the tank but can deliver the gecko