Try to get the clerk to help you.

The clerk leans back against the door and checks you out with a smirk. You'd dearly like to punch the asshole and wipe that nasty grin off his face, but in your present condition starting a fight probably wouldn't be a wise move. The clerk's obviously smarter than he looks, after all he worked out how to get you here by wishing. You clench your fists and take a deep breath to calm yourself.

"This is going to sound pretty messed up, but if you saw me change then you already know that something freaky is happening." You say. "See this collar? I've got to get it off and I need your help."

The clerk peers at the collar and frowns.

"It hasn't got a buckle or anything. How the hell did you get it on?" He says after examining it. "Is this what turned you from a dude into a babe?"

"It had a buckle when I put it on, but it sort of disappeared. And yes, this is what changed me." You explain. "I reckon if you wish out loud for the collar to come off it will. I really need you help here pal and I'd be willing to pay you well just for wishing this damn thing off me."

"Uh huh. So this collar thing doesn't work for the person wearing it then?" The clerk muses out loud. "But when that dude wished his chick looked like that poster you changed and when she wished to be bought a present you suddenly had to buy her something."

The clerk has an unpleasent gleam in his eye and you're getting nervous.

"I wish you'd hand over your wallet." The clerk says after thinking a moment.

You reach into the back pocket of your ill fitting jeans and dumbly hand over your wallet.

"Hey come on pal, don't be an asshole." You protest as you give it to the clerk. "Look, just get this damn thing off and you can keep it and all the cash in the wallet too."