Old Mutual - Really???

I have a Old Mutual Money Account. I recently changed my cellphone number. i called the call centre on ***to update my cellphone number as i need to log into cellphone/internet banking. I called yesterday 07/04/2020 and the agent advised i need my card number (which i didnt have at the time to do the changes/amendments) i then called again today to update the my cellphone number as i have my card with me. The Agent now advised i need to go into a branch but cannot advise me why after the first agent told me the changes can be done once i have my card. Please note that due to the Lockdown all the OM Branches close to me closed so how in gods name am i supposed to do the changes when i was told i can call in the next day when i have my card??? Coz of this i cannot access internet banking which is causing a huge inconvenience in my life as i need to access funds!! i need my details updated asap. If not, i will move all my policies which i am paying a lot for from OM to a company who will look after their clients in time of need!!