Does not adhere to the contract upgrade

On Wednesday, 30 August 2017, I upgraded my contract at Mtn Festival Mall. I received a new S8, & the current offer includes 10Gb data over 3 months, as well as a 256GB memory card, when you register with Samsung Rewards. According to Bongani Kumalo, the Manager at this store, Samsung would be providing this card. I susequently registered with Samsung Rewards, followed all the instructions, called the Customer Service Centre, as usual no answer, sent them an email, & the reply received was as follows: Samsung Rewards does not handle the contract offers that Mtn provides. My question now is: who is supposed to provide me with this memory card??? In the past I had the same problem, with my Samsung tablet & Vodacom, being broken, & Vodacom refused to repair it, stating it was Samsung's problem. After more than 6 months of fighting, eventually Samsung provided a company that repaired my tablet under warranty & I haven't looked back since. Are all Cellphone Service Providers currently out to provide the poorest service possible.