Funds debited from my account as an internal debit from absa

I am a client of Absa bank , on the 27th of August an amount of r778.91 was deducted from my account . Upon querying this amount I was told that it was an internal deduction and they cannot see the reason why that amount was deducted . I was transferred from one department to another with still no joy of getting my funds refunded into my account. I was then told to contact the branch because they would know better I tried calling both midlands mall and chatterton branch but their phone just rang and rang . This is so unfair in these trying COVID times that your money can just be taken without an explanation shame on absa for such poor treatment of their clients. I do not have a credit card or personal loan or overdraft with absa to warrant such a deduction . I would like for absa bank to contact me to resolve the matter.