Bad customer relation over shoes

I bought shoes a while back and realized the shoes is different as it is a manufacturer fault and advised Woolworths head office and was advised to take shoes to nearest store which I did on 16 October and shoes was supposed to be sent to technologist a week ago. I got a call yesterday from the shop I took the shoes to and they selling my shoes for R50 how does that happen. Someone didn't do what they supposed to. Instead of them sending my shoes to Head office to be checked out they saying they selling it. How does it work? Phone calls and emails proof no emergency