I've been applying for part time jobs but nothing yet (even in the seasonal jobs). I've made myself available every evening and all weekend every weekend on every application but still haven't had any bites. That is curious.
First, how are you applying? If you're applying online (most large companies now seem to require that you start there) then you still need to go into the store, speak to the manager, tell them you're interested and that you've already filled out an online app. This is how it worked when my kids applied to the grocery store chains.
Second - ask a GOOD friend (the kind who will tell you the truth) to critique your interview outfit/appearance. Are you presenting as a put-together, competent, positive, professional person? If this stuff isn't your forte (it's sure not mine!) ask your friend to help you with a makeover.
Third - ask a friend to vet your resume.
Fourth - keep plugging at it, it's darn tough out there!!!