Disgusting poor customer service!!!!!!

Opened a NEW ACCOUNT!! Yet, my old previous account details ( according to customer) was used when they approved the account.....this account was opened online, using my current new, updated details. I did not receive my R1500 in vouchers and they approved my NEW ACCOUNT with my previous surname. Now they REFUSE to update to my current surname and also I am told I am not getting my vouchers because I did not buy for R500!!! What a load of bull and the poorest of poor disgusting customer service I have ever endured!!!! No one, but no one is willing to assist or even LISTEN to what I am saying??? So, does customer service require a marriage certificste from every woman that opens a NEW ACCOUNT??? To proof that her surname is correct???? Why did I have to provide all my details if HO was going to approve my NEW ACCOUNT using old outdated information????? I will not leave this here and will most definetly take further action. Where is the current details I provided when applying for this account? Missing?? Somebody better phone me and sort this out!!!!