How would i quit my job at Hollister?

i got hired at hollister a month ago and still have not been given a shift even though i called the manager numerius times. I now have a new job which pays waaay more. How do I go about quitting seeing as I have never even worked there? Do I even need to bother quitting? I just don't want them to randomly call me one day when I have work at the new place, plus I don't really care about the discount card since I prefer more grown up, classier pieces of clothing)j.crew,lacoste,toryburch,etc)