Bad customer service ever

I bought a pair of morning slippers last week and it broke y.day as my sob was wearing them the hole stitching came loose and took it back today but didn't have receipt with me but just wanted to exchange for a other pair seeing that I just bought it last week got there and they told me they don't exchange or refund without slip and just gave me customer cares number for me to phone them they put no effort in even trying them selves to do anything about it ,I work in retail and if u have a broken product u need to exchange because customer is not liable for breakages and it was only a week old