Poor service

I've had the worst experience with standard bank regarding my cellphone number which I have since changed. I need it to be updated so I can receive OTP for purchases and so forth, but till this day nothing has been done. I have been to the branch and they said it is updated but, of course it was not updated. The service is appalling. The consultants in the bank including the branch manager are awful to say the least. I waiting for well over an hour just to receive my new cheque card which was delivered to the branch. Overall, standard bank is poor, very poor.