Terrible service and failure to refund return

Good day I have been a loyal customer of Hirsch for 5 years. I have spent close o R70000 with them fitting appliances for 2 new kitchens. Four weeks ago I ordered a new Whirlpool ixelium 6th sense oven and microwave from them and bought a hob as well. The hob was not suitable so I returned it the same day unopened in original packaging. I am still waiting for a refund from them for my return. Salesperson needs to be called numerous times with empty promises. Also there has been no stock of the oven which I have to call frequently to enquire about. I emailed the owner Allan with no response as well.