after making payments and arrangements

our office rejected a repair quote and arrangements were made with Zanele for the trade in of the printer for a new one, Zanele then got Kingsley to assist me with the explanation of the trade in of which he did and even gave advises. the payment was finally made on the 02/08/2015 as Zanele had advised us that the money must reflect on the shop's bank before the end of the special. on Monday 03/08/2015 i called the shop and spoke to Zanele who confirmed that the money does reflect and i can come collect the printer. i then made arrangement to collect it the latest Tuesday morning, today i drove all the way to the shop to collect and when i got there after waiting approximately 45 minutes and Kingsley telling me he doesn't know me nor does he remember speaking to me and Zanele telling me i should remember that she didn't even know what printer i had chosen, i got to be told that they are out of stock. now how come two people who were working on the same deal all of a sudden know nothing even after speaking to Zanele on Monday telephonically how come they never communicated among themselves? i wasted my time and petrol coming to the shop ofr nothing at work they think i am lying