Out of stock on contract package

On the 9th of Nov 2017, went to mall of Africa to purchase a contract package of a laptop, which came with an extra 1 TB hardrive. The lady by name of Bongy Mcunu who was assisting me was not even aware that the laptop has to have an extra 1 TB. When i point it out to her that my items are not all in the package as they are supposed to, she went and promised to get me the missing 1 TB with in a week, so she will either send me an email or call me to come collect it, since she didn't have it in stock. I went to the store again on the 15th and still i didn't leave with my hardive as the stock was not there still. On the 22nd i emailed Bongy asking for feedback on the item, but never responded to my email. On the 24th i went to the shop i was told that nothing has been ordered under my name and the person who is responsible for that(Bongy Mcunu) is not in, Eric Masombuka tried to be of assistance by sending both Bongy and the store manager Algernon Matthews an email with regard to my 1 TB, none of them have responded nor acknowledged the need for them to get me the hardrive. Pathetic after sale service and customer care.