Barnardo's Store Associate interview questions

Applied for store associate job for Barnardo's on Indeed and didn't think much of it as I thought it was just a regular retail role and when I got to the interview the recruiters interviewing me were lovely, they made me feel very welcome and made the interview process feel natural. However, I barely got into the interview before I was turned away for my age as the role was in actuality a key baring role which came with a certain age limit, this wasn't advertised in the listing at all and was absolutely gutted when I found out they couldn't continue the interview because of that. Overall, lovely people and great attempts to make a calm and inviting atmosphere but they need to learn how to properly advertising so that there is no further confusion made and that this time can be spent interviewing more candidates that fit the restrictions required for this role as well as explaining what the role properly entails.