If that doesn't produce a response quickly, I would talk to the humane society and you can probably make a complaint about them.
From my experience working in a petland, Market Mall Petland has always had by far the worst conditions for any of their animals. They are very bad at cleaning out the kennels/cages in a timely fashion. The kennel techs when I worked at crowfoot had to check the kennels every 15 minutes, or if any other employee saw that one was dirty you had to tell them so they could clean it.
I'm sure I'm not the only past or present employee to have noticed the lower standards in that one store, and their head office was supposed to be doing regular visits on all of the Calgary stores, so I'm not too sure if talking to them at that level is going to accomplish much.