I just wanted to encourage you, I have a moderate stutter, applied at Apple Retail and got the job. My experience was similar to yours in terms of my stutter. You would be surprised how little prospective employers think of your stutter. Places like Apple even look a little higher of the “stranger” folk to diversify their stores. It wasn’t your stutter that stopped you getting the job. Probably your confidence around your stutter. You are more than your voice so step into it bro!