Changing of OTP number

<p>Ooh my goodness I am sooo frustrated and feel like crying...at first I called the call center to try and change my cellphone number for otp and they refered me to the branch ..Fine, I went to the branch to change my cell number and the teller said the consultant should have done that for me. Right the teller changed the number and told me that it should be okay in 2 hours..till today I am unable to finalize the change of the cell number ...I tried to call the call center so many times and waisted the aitime I don't have (I am talking 40 minutes ) only I get is a voice over that's so annoying that says "We are experiencing high call volume"</p>