lack of customer service

During the month of December Telkom mobile had a promotion whereby you purchase bundles via *123# and you would subsequently receive a free gift aligned with your purchase. I purchased a bundle on 12 December 2017 if my memory serves me well and when trying to claim my free gift it was never credited to my account. I logged a query with customer care and was given reference number ********** 8, When I followed up mid Jan I was told that my case had been closed, I asked that the person responsible for my query be emailed and asked to contact me. It is now 20 March 2018 and to date no one has contacted me, nor have I received the gift due to me. I am outraged by the lack of response or service received on the matter. I purchase bundles monthly and weekly and when promised a gift I expect to receive it!