Your retention strategy sucks

First off - I have been banking with you since before i even earned an income. I called a number of weeks ago requesting assistance in changing the cellphone number my OTP is sent to when it requires 'Visa Authorisation'. I was told my 'team of bankers'cannot help and i need to go to an ATM. Firstly that was pathetic because you market this 'team of bankers'to assist with everything. I then went to the ATM and changed it and it still does not work. Please understand if you cannot assist me by the end of today I will be looking for a new service provider as i am fed up with FNB!