No delivery on water tank

We purchased a JoJo water tank from your store in Northgate, Cape Town on 19/08/2017 and were informed on the delay in manufacture and delivery at the time. We were called to arrange delivery for the 14th of September. My wife made herself available on this day and the delivery did not arrive. Over the subsequent 2-3 weeks we have called the store repeatedly and nobody has been able to help us or explain why the delivery has been unsuccessful, we have been unable to speak to any manager and we are told a variety of reasons why we can't speak to them , including that they are having problems with deliveries, or that the manager is in the yard trying to see what our problem is! Simply stated, after more than 2 weeks we are unable to speak to anyone as why our delivery did not arrive and to arrange an alternative day. I have now paid R4800 for a product that has never arrived, nor do we have any way of receiving an explanation or any feedback on when to expect it.