Standardbank-Worst bank to deal with by far!

Thee most *********** organization I have ever dealt with! Standard bank had a systen glitch in Feb 2018 and did not debit my account. I then made arrangements for a double debit the following month to no avial. I have received letters of demand and harrassing calls demanding payment for somthing that was not my fault to start of with. I have been to the branch and have made numerous calls to have this rectified, which was only done in June 2018. A double debit went of my account successfully. I called the call center and spoke to Jameil who sent me a letter confirming that that my account is paid up to date and I am not owing any outstanding payments on this account. In July 2018 I get double debited again! I called the call center and was told by Tsepho that this is for a missed debit in December 2016. I am baffled! How is this the first time I am hearing about an amount from 2016? I then spoke to Ponalo Raditla who seems anything but helpful. And has not given me feedback as yet! Her lack or urgency, rude tone and lack of knowledge as to how processes work within her ororganization leaves me wondering how she became a manager in the first place. But then again, it is standardbank we are talking about, shady business and incompetence are their strongest "assests".