Upgrade Deal Lost

I called the store Friday 02/10/2015 requested the deal for the S6 Gold 1TB Hard Drive, I spoke to Leslie. He said he'll place an order, which arrived on Monday 05/10/2015, I asked for the paperwork to be done. Nothing was done when I got to the store on Monday. Leslie handed me over to Daryl or Darren. Vodacom had yet to receive a payment, the EFT was made and a notification came through that payment was received. I was told to come back in 24hrs for it to reflect. I then left my ID copy and docs there and asked that the paperwork gets done once it reflects. The next day I called in the morning, and it hadn't reflected yet. I confirmed with Vodacom if it reflected a few hours later they confirmed. On 07/10/2015 Wednesday called the branch and asked if I could come through for the upgrade? They said yes, so I came through and then the deal wasn't available anymore. I called the Regional Manager Cornelius who said there is nothing they can do. Please assist as if the paperwork was done I would have my deal. I have been waiting to upgrade for months already.