Samsung TAB A with S pen out of stock in all shops

You advertise on your MTN cellphone brochures the new Samsung Tab A, but you don't supply stock to the MTN shops as required. Been following up at Midrand and Brits shops for the past 2 months to no avail for the tablets. They always indicate that new stock is arriving, but every time there is no tablets included in the delivery. Considering cancelling my contracts as they expire in one month's time and not upgrade due to no ample stock available at MTN stores.