Cancelling contract due to fault on their side

I app**** for a loan on/about 20 October 2017. The loan was granted on 21 October 2017 and paid out to an account number whichbwas unfortunatly closed and with out confirming the account numbers with me. We struggeled the whole morning of 21 October 2017 and sent through the newe details swveral times on 21 October 2017 as well as by the bank on Tuesday, 24 October 2017. We need to phone them constantly to follow up on the change and today it was indicated by them that the agreement is cancelled and that they once again paid the amount into the wrong ( and closed) account. We have sent them the amended and new details several times. We have followed up via e-mail and loads of calls with no avail. I as a client making prompt payment each month is highly upset.