It's real easy. Clock in, go to personnel, give them a letter stating that you are giving your 2 weeks notice. Then, find your assistant manager and hand a copy to them. Then find a shift manager and your store manager and give them each copies. Now everyone has a copy, so they don't really need to make time.
It sounds like your store unfortunately has poor management. Don't let that discourage you and quit without giving notice and giving yourself a bad work history for other employers. What you should be doing (IF you want to keep working but are unhappy about whatever nonsense you mean) you should follow the chain of command. If your CSS/CSM doesn't have time to talk to you, go to your assistant, if they don't have time either, go to the shift mgr., etc....or another option is if you like the company - just not that store put a transfer request in.