Absa not following through when money is removed from their account.

I have an issue with how they mismanaged the issue of my mother's money that was in their care and didn't seek further consent when Mr Siphiwe Nkala came and took the money out. They kept quite. Yes the lawyers were given a right to deduct money from the account Phumzile Mazibuko had with Absa who passed on 26 April 2015 and her estate was handed to Nkala attorney to resolve but nothing was ever done cause everything was destroyed by Phumzile youngest son and now there is only a building that is empty and the cars both disasembled and sold by her son n *******. So what's is left if her money that we left at Absa n now we told it was removed without our knowledge. How could a big bank be so grossly careless and not do follow through before allowing a so called lawyer to have power of attorney over their long existing client and not involve the family that came to claim the funds as beneficiary. I am have lost the beneficiary whom was Grace Mkhwa**** mother to Phumzile Mazibuko and now it's Nonhlanhla Mkhwa**** who is doing this review cause I feel cheated by the bank and Sphiwe Nkala of Nkala attorneys. Please sort this out and if you want get hold of me you can call *** or ***. Email mkhwa*******