No Delivery of goods & Bad service

I ordered clothes on Jet online (order number # ********** 46) early in November. A week ago I checked my delivery status and it said it was delivered but it wasn't. I've have since spoken to Jet ONLINE more than 5 times. I've also spoken to the courier. Someone signed for my delivery but it wasn't me. After call 3 they established it was dropped off at a store and they promised to get back to me. 3 days later I again called and again they promised to escalate the matter. Yesterday morning a manager phoned and her first question was "it says you received your order" - SHE HAD NO BACKGROUND INFO AND THOUGHT IT WAS MY MISTAKE!. I don't know whether they don't log calls but she promised to phone back but I am still to receive a call and still to receive over R400 worth of clothes. It is my first time using Jet Online - my advice STAY AWAY!