Looking for opportunity

Hi, I’ve been applying for every opportunity in my area for more than a year now, and have had interviews with several managers. Every time, I have received the “we’ve moved on to another candidate” email. I know I’ve never worked for any telecom company, However, I’ve got amazing customer service experience and can show so many proofs of that. I’m highly dedicated and loyal. I have experience setting networks up and love keeping up with technology. I’m looking to prove myself, and find a new work life. I’m eager to start with At&T. I’m looking for employment but will take advice on how to be the best candidate for my next interview.