Poor service in 3 different branches

Firslt i complained on your fb page and I was totally ignored while everyone else attends to FB queries. I went to your branches in orange farm,carlton centre and the glen to fix my internet banking problem. The OTP keeps being sent to my old 073 number which i have not used in more than 2 years. After each visit i am assured this is resolved but to this day I cant use internet banking because the otp is sent to my old number. I need you to fix this because I cant go to another branch without loosing my cool. This is unacceptable. As son as I balance my fnb cheque acc I am going back to Fnb. Standard bank makes everything complicated. I am yet to register for cellphone banking because even that is complicated with your bank