Uncertified about lack of information and poor service

Bought Russel Hobbs Iron at Game Centurion in September 2020, in march 2021 it just stopped working. I took it back on the 12th, they told me they have to book it in for assessment which will take 21 days. I'm telling them I can't wait that long as I don't have an Iron at the moment. And I'm asking why are they not telling us this information when we buy only when you have a problem you discover that they cannot exchange. I'm disappointed even the cashier was unfriendly.