Bad Customer care by Standardbank

standardbank financed my vehicle which was recently written off .Iwyse have settled the vehicle to the tune of 141646.56.Durring that time,the settlement was at 139000.meaning that the bank must refund one instalment.The bank have never paid the money back and to my surprise,today they have deducted the instalment again.meaning that they now owe me two installments.What surprises more is that there is no money visible on the app but they continue to deduct money.I tried to call but I was so tired of holding until ***s come home. This bank have failed to finance my properties which are currently being financed by nedbank.Recently I requested finance for a bond and I know it will be declined. The best wYis to leave the bank and I will never recommend this bank to anyone.I opened the account in 1992 when I was still a student but the benefit of staying in this bank is minimal.They failed to finance my other 4 vehicles which were financed by nedbank though my salary is paid at standardbank.So why stay ,?