Terribly disappointed

I have bought a pair of crocs online and with delivery they have messed up my order with the delivery of the wrong shoes. I desperately need the shoes for work - health care worker who requires to wash my shoes everyday with COVID pandemic. Sadly the shoes they have delivered is material and not really amendable for daily washing and quick drying. With delivery I have immediate contacted them. Their switchboard has cut me off a few times therefore I l ended up calling them multiple times to inform them about their mistake. So after 2 weeks I still haven’t received any correspondence from them confirming an exchange. So I phoned them again- total of more 30 min of waiting. According to them it will take another 7 days for potential change of purchase-mistake not even logged on their system. So disappointed in their lack of service and complete discard for the initial report of their mistake. Wish Crocs SA could be more respectful of their clients.