Report them to either your local animal control officers, humane societies, and or department of agriculture / environmental protection.
If you can remember the last dates that you have gone in there let them know. just so they understand that it has been an ongoing problem.
If you need any other ideas if no one is listening to your complaint etc, just post them here.
this is a great group with lots of support.
One last thing, Good job in reporting them, sadly many people just over look "pet store problems" which is why they are able to stay in operation and continue selling sick and neglected animals. so good for you!!
let us know what happens
Rusty