Discovery Bank Poor client service

Well on the 24/07/2021 my discovery bank app was locked I have requested on the 28/06/2021 that my number needs to be changed as I don't have the number it was linked with they phoned me that saterday linking my new number on to my profile so that I can receive my OTP to reset my password. Well I am still getting the message "The ID number you provided doesn't match what we have on record for this cell number. Contact your Discovery service team if your details have changed." I have phoned discovery every single day regarding this problem and was put on hold for most of the time and getting the same feedback that they are escalating the problem costing me money because they don't phone me to give me feedback and the results still the same. Even the manager of the department didn't have the decency to phone me back to give me feedback after I have spoken to him. How difficult can it be just to change one simple phone number. Today 29/07/2021 the OTP department phoned me to verify me and asked if this is the new number I want to be loaded on to my profile and I said yes, just to hear its going to take 3 working days to be done. I am so fed up and tired receiving no results but the same excuses every time I phone them.