Sandton City Branch - Admin Mismanagement and Lack of response

I have requested a copy of my tax invoice to Incredible Connection Sandton City for a purchase made in December 2018. I supp**** a copy of my bank statement, together with my ID and everything they need in order to give me the copy. I used their website (sent messages on their form on 2 occasions addressed to the Sandton City branch specifically because the form allows you to chose a store) and ended up using their Facebook chat because they don't answer the phone at the store either. On the chat, they assured me that they have also been requesting the copy of my invoice from the store, and the store fails to assist. I am not sure who manages the chat, but they said they escalated the issue because the store is not answering. So here I am, sharing my experience publicly to grab the relevant person's attention to see if you can fulfil such a simple request as sending the copy of a tax invoice to a customer via email. Not replying to the costumer is bad enough... but not replying to your own colleagues? That speaks volumes. Thank you very much.