Failure to resolve simple queries.

Time and time again Standard Bank is proving to be the bank to avoid banking with if you value your peace of mind. The simplest of queries go unresolved and lead to customer frustration eventually leading to losing salary clients because of incompetence. I won't touch on my previous dissatisfaction with the bank but the current, I opened a Sum 1 account for my son as Standard bank was the only option at my son's school, which then led to me re-opening my accounts. I registered on the app and could access my son's account which I managed to make an inter account transfer to but now the account has just disappeared on my profile. I need it to be linked back to my profile as I want to make transfers to all accounts. I tried to get assistance on the app chat and was assigned to Nonhlanhla(I selected digital) as the first agent who then transferred me to transactional banking and was assigned to Fanelwa. I provided my son's ID number, last four digits of my card number and the last 4 digits of my sons account number, I was transferred to Digital which I was initially at but could not be assisted, I was told about her/him not having a mandate to link my son's account and need to go to the branch. Why was my son's account removed from my profile? why am I now being inconvenienced and subjected to your own incompetence? The ACCOUNT WAS LINKED AND I COULD MAKE AN INTER-ACO**** TRANSFER, Can this be FIXED as I honestly did not want to re-open any accounts with Standard bank based on my previous experience, I even told the school about your poor service but I gave it a chance now I am regretting my decision. I also tried to call the contact centre for assistance but I was on hold for 20 minutes. I WILL NOT BE INCONVIENCED BY HAVING TO GO TO THE BRANCH FOR AN ACCOUNT THAT WAS ALREADY LINKED BUT WAS REMOVED WITH NO INDICATION WHY..