VERY FRUSTRATED AN UPSET

I have a personal loan with nedbank at a very high interest rate to start off with an im a private banking client to top that off, besides that the bank updates incorrectly on the loan account an incorrectly on statements, Im constantly in arrears but the account has a debit order running on it. How the hell is that possible, they list me on itc as being 30days in arrears when the account was debited 3 days late, besides that they send me incorrect statements stating that I'm still in arrears which I'm clearly not, Im trying to apply for a homeloan an this is putting me out, I am so furious, I feel like closing all my accounts an moving over to another bank. This is unacceptable, for a bank that I thought so Highly of. If my itc isn't updated by the weekend, I will be closing my accounts.