POS deducted 6 months after purchase " system error".

ABSA deducted more than 5000 from my account on the night of the 11th October 2017, i received more than 20 SMSes of purchases made up to six month back. This purchases had been cleared from my account, there was no unclear/ pending transactions on my account. My account is on the negative side right now. worst of all nobody called to explain that it was an error and happened to several customers last night, very disgusting and i pay a lot for my bank charges to get such ineptitude. i went to the Tzaneen branch on my "own time", they told me more than 10 customers had experienced the same problem. Very appalling behaviour by ABSA, after 12 years with them i'm considering moving to FNB. Who is going to pay for the admin penalty? why not let us know? an apology is not enough i won't ever trust this stupid bank with my money. Stop *****ing from hard working citizens.