Can I leave the store without paying for my purchases?
Why would you leave the store without paying for your purchases?
I don't want to pay for the items.
Taking items from a store without paying is wrong. If you can't afford the items, then you can't have them. Stealing is a criminal action and you could be arrested.
It's not stealing, it's borrowing and I'm getting back at the store for overcharging me once.
Don't you think you should just pay for the items that you are buying? If you realize the store overcharged you, you can talk to customer service about getting a refund. If you get caught stealing the items, they will probably call the police and you might be banned from shopping there.