Refund

I bought shoes 26 August which was Tuesday and got email confirmation to sat shoes will be delivered after 48 hours on Saturday 30Aug i send the WhatsApp enquiry about my order they told the shoes i order is oversold they ask if i want another pair of shoes or refunf i said i no can they refund me my money it will be done by the end of week today is Friday im calling and texting they are not responding