ABSA mixes up my account details with someone else

On Tuesday 14 August I was telephoned by one of your representatives called Mpho. She told me all about the benefits of ABSA Rewards programme and I agreed to sign up for R23.50 per month. At the very end of our discussion she quoted the last 4 digits of my credit card and on checking with details on my credit card, it turned out that the credit card number she had was completely different to the one on my card - even though all other details of my name, ID number, address etc etc belonged to me. When Mpho saw this discrepancy she said she would have to find out the reason why my own credit card details did not match the one she had, she said she would investigate and phone me back in 5 minutes. I am glad I did not hold my breath because now at least 36 hours has passed. What kind of service is that that ABSA is offering ? You don't have my correct credit card details on record and then you just never come back to me to explain why this very serious mistake is occurring on my records with ABSA. Really and truly worrying. I was considering taking out more products with ABSA but now I have no faith in ABSA service.