Wrong information provided

I have been shifted from pillar to post with regards to delegation of my mother's FNB credit card. My mother is very ill and cannot speak due to lack of breath and nobody can assist me! I have been given the wrong information from the call center and the Sandton City branch. I have done everything they say that needs to be done and when going back to them it is not enough! This all started in the verification process whereby the CORRECT pin was entered 3 times and the card was deactivated due to incorrect pin. How is that possible? Now all of this running around and bad service due to YOUR system being faulty!!!! I am disgusted with the service and lack of empathy. Please assist.