Blocked chip

I am a platinum card holder at Absa. There were people that phoned me stating that they were calling from Absa, but when I ask them how I would know if they are definately calling from Absa and I was told to go my nearest absa which I did. The consultant was unable to assist me because there was no message on the system. I recieved the call again which they also asked me for my id no and I asked them to at least give me few digits of my id so that I can complete it as I also needed confirmation that they were indeed calling from absa I was told to go to my nearest bank and hung up. I went into a branch again, but again no message on the system. I was then unable to swipe at any retail store and then after 4 visits to the bank then they realised that my chip was blocked due to an overdrawn amount. I was told that the problem was fixed but had to go back to the bank 2 times because it wasn't fixed. I was now unable to withdraw nor swipe with the card. When I phoned my banker she told me that she had forgotten to reset the chip. They could have just put a hold on my account so that they get the money when my salary is paid. I am a new client with them & I'm very disappointed!