Student Silver Rewards

I complained on HelloPeter before, and they responded, said they would fix the issue and still have not fixed the issue. So here it goes again. I have a student silver account with ABSA Bank and every month when I am supposed to claim my rewards, it gives me an option to choose from the rewards, and no matter which one I choose, IT NEVER WORKS. I have opted for the 100 data, I get a message stating that I will receive a message when the data is loaded and I never receive such message therefore never receive the data. I have opted for the food voucher, and when I try to use the voucher it tells me that it is expired, even though I only received the message five minutes prior to using it. This is the worst service I have ever received from a bank, which is an institute that should thrive on customer retention, yet they seem to have no regard for students, who could be their lifelong customers, should they treat us right. 1/10 would not recommend. They keep promising me that they will get back to me but never do.