Delivery of knife set pending for months!

I asked for a knife set to be delivered to your store months ago. It was weeks before the first knife set arrived. I knew it had been delivered only because I called to confirm its delivery but the set delivered was not what I had ordered. I left a message for a store manager to call me to ensure the correct set was delivered. A manager never did call. I called the store to again request that the knife set be delivered. The call for the second request was made more than a month ago. After several follow up calls I was advised by a store manager that the set was on its way from Pretoria and should arrive no later than two weeks from the date of that call. The manager I spoke to was supposed to keep me updated on the progress of delivery. It has now been several weeks since I spoke to that manager. I called the store yesterday (The15th or more call to your store) to ask that a manager contact me urgently. Nobody called of course so I called again today and was told by an employee that the knife set has yet to arrive. Needless to say, the standard of service I have experienced is shocking and all because I cannot use my gift voucher when purchasing from your online store!