PATHERIC..NO SERVICE

PATHETIC SERVICE...actually NO SERVICE!!!! I have been battling for almost two weeks to get them to change my banking details but to no avail!!! I am out of the country and cannot phone so have to send emails. Even my broker tried with forms that I completed and signed,,There online website is NOT user friendly and I cannot change anything there as emails and phone numbers has changed so I am unable to receive OTP's.....PLEASE CONTACT ME ON THIS NO +***