Premier Banking Service Disappointment

I recently tried to settle my vehicle finance online line seeing as I have all FNB bank accounts including my vehicle finance. I transferred funds out of my FNB current account and into my wesbank ISA account which the system allows you to do and is reflected on my online banking profile.<br> <br> I am in the process of trying to purchase a new vehicle therefore I wanted the current ISA settled immediately therefore upon making payment I contacted wesbank to obtain a settlement of debt letter. Wesbank advised that they had not received any payment even though the funds had already gone off my FNB cheque account. I immediately contacted my premier banker who advised that there was a problem with FNB's system and she will ensure that it was resolved within a hour.<br> <br> On Monday after having spoken to the premier banking consultant I checked my online banking and the funds still did not reflect in my Wesbank account. I contacted FNB premier banking again this morning who advised after conducting their investigations that there was nothing they could do as the funds were transferred using the wrong account number. How can FNB's online banking allow you to make an incorrect transferred?!!