Online shopping went wrong

Im struggling with Miladys. I bought a dress online 4 November 2020. When after 6 weeks i did not receive my order i phoned the head office in Durban there was no answer and i even sent 3 emails to their customers service centre which i didn't get any single response. After that i decided to go Greenstone Miladys shop which i got help and a lady called from head office called me back and i told her i was no longer interested i need my money back. She said someone frim finance will call back for banking details up to now 19/01/21 no one has called me back and if i call the Durban Miladys numbers they just ring no answer. Please help i want my money back