Cell phone registration

I purchased a new cell phone in November and have been trying to lint it to my on line banking profile since 26th November but without success. When i try to log on it says it is sending an OTP which never arrives. I then advise the system that i am not receiving the OTP's and i am requested to confirm my OTP details on my desktop. When i do this nothing happens and I am blocked for 48 hours. When I try again after 48 hurs the very same thing happens. Have spoken to at least 10 consultants and no one can assist. When excalated nothing happens. When I complain on line nothing happens. No one responds and no on helps