Unfair Billing

I have a loan with Ubank, and I changed my Banking details <br> I contacted Ubank to please change the details on their side , so that the Debit order could go through as requested<br> I was told on numerous occasions that this would be done , however it never DID<br> I then sent through a complaint , I was then told I should make payment for this the first month, then they will change it on their side<br> <br> TODAY I RECEIVED A CALL FROM THE ATTORNEYS ,ADVISING ME THAT I HAVE BEEN HANDED OVER FOR NOT PAYING MY ACCOUNT - NOT ONLY HAVE I BEEN HANDED OVER BUT INTEREST HAS BEEN CHARGED TO ME AS WELL!!!<br> <br> This is not my fault , I don't see why I should be liable for this<br> I Have all the emails sent to the call centre advising them that if changes are not made I will not be liable for any extra charges !!!<br> <br> THIS NEEDS TO BE SORTED OUT ASAP !!!