my problem is not resolved

i got an sms on my phone from African bank. stating this Dear client, Discount GUARANTEED on your African Bank acc ref *** this Easter weekend. Call SSDA on *** today and activate this once off offer! i called this number *** and spoke to a consaltant and she said she cannot see anything on their system regarding my sms. i called again and i spoke to a customer service agent and i expalined my story that since i got this sms i want this discount and he said he cannot help me and ascalated the matter to the supervisor Mr Sam Mokgaka Tlou. i expalined my story and asked if he can give me the discount that the sms promises me. he said he has checked me on their sms list and did not find me and my account does not qualify for a discount. i forwarded him the sms and he said to me he does not know where the sms cames from maybe its the ****ers tyring to **** me. i told him i refuse to take what he is saying because 1 i opened my account with african bank then why would the ****ers have my details? or is it that my information with african bank is not safe. i want my discount according to the promise of the sms PLEASE. Sam said they cannot help me with anything. HELP