ABSA don't want to reimburse me after they alerted me to ***** on my account

I have been a customer with ABSA for about 30 years, first with Volkskas, then Trustbank, now ABSA. Towards end of June ABSA alerted me to ********** activity on my card. They subsequently stopped my card, but even after that, more ********** amounts were taken from my account, even though they were held in a ***** account at ABSA. ABSA did not take responsibility for them. I was subsequently told I have to investigate self and have to try and get back the money myself. I am very disappointed with ABSA since I have been a loyal customer for so long, and I thought ABSA had insurance against these type of things. Also, why am I paying the banking fees?? All in all, I must have lost about R5000, which I cannot afford, since I am a single mother (widow) with 2 kids. My husband has also been with ABSA all his life, our bond was with ABSA, etc. I will soon be closing my account as soon as I am able to move everything to another bank account. I will still try and get my money back, but don't count on ABSA.