Double deduction error

If one bank should close is this Nedbank. I opened my account more than 5 years ago and they got my title to MR and not Mrs. Years later to today I got double deducted on my home loan account because of their system errors no apologies and when I request my refund it is now a hassle with case number ***1 and other numerous calls I made. I eventually cancelled my debit card and just have this account with them. Their systems are porous to the point where any ***** can happen on your account and they will still blame you. They can’t even map my home insurance to my loan or change my title laughable really. I would urge people NOT to bank with Nedbank!!!!!!! Their managers hardly will be put on line to speak to you. Always the front agents who are clueless in the home loan department. Because of this double deduction my credit score will be affected and a sorry will not cut it!!!!!! And just by the way my home loan is in advance for over a year worth of debit order principal amount.