Lidl Customer Assistant interview questions

Applied through their website, a few weeks later I got an email asking to arrange a phone interview. First few questions were about when I would be able to work. The interviewer then told me that it was a 25 hour contract, which I could not do. I had to withdraw my application. (I'm certain I put on my application I couldn't work that many hours so I am not sure why I even got to that step of the process).