Update of details a nightmare no OTP

I have cancelled my cell phone contract and have been trying for over two months to update my new numbers online. The following has happened:<br> Called the Prestige call centre, told to call the branch<br> Branch say update online<br> Couldn't change online I then called the online call centre<br> That call centre told me to send a secure message,<br> 2 secure messages sent still no response<br> Tried again in vain to update my details and decided to change OTP to email and as this may be easier.<br> By this time I have some messages from you coming through on one phone and other messages coming through the other<br> Now the emails are not coming through when you require a OTP, and I cannot see if I have put in the wrong email address as I need a OTP in order to get in to change it.<br> A lady called me in response to my secure message but didn't give me any contact details to call her back, she was nice and said I will update it for you my side... Guess what it doesn't work and now I cannot send another secure message as I do not have a one time pin...<br> <br> Now trying to log into online banking it will not allow me into the system until I have updated the details for my one time pin, SEE BELOW<br>