Poor service and *******

I ordered an item online on 29 Nov. I received a package on 5 December. It turned out to be someone else's order. I immediately sent an email to notify them. No response. On 9 December I phoned a number and got hold of a person named Kaira Chetty who informed me they will investigate and collect the item. To date nothing has happened and I have sent follow up emails with no response. Pathetic. They owe me R2000