Dysfunctional, app, website, call centre & agents. Nothing works the way it should!

Somehow they have found contact data never provided to Discovery Bank, adding my contact details and my wife's details from many years back, we both with discovery health and the "old discovery bank". We have had the correct contact details all along, everything was perfectly fine until the new Discovery Bank came along. I have been trying to migrate the account but cant do anything due to the contact details issue. They now somehow add my wife's number to my profile and i cant get it changed. When I do a verification SMS it says my account is registered to another user. I have logged 3 service requests and this has been going on now for months. I have lost count the amount of times i have called the bank, i am past fed-up and over it. I have given my details over and over and verified it over and over, surly you been contacting me for years, how do you get this so wrong??????? Discovery IT department is putting out hogwash. I try and update details that was right on my health profile and cant do it as the stupid program is asking for a home contact number and will not allow you to save as a result. Sorry to say but your guys stuff is currently a **** show! I need to someone that actually knows what the hell is going on to contact me! Please go and test your stuff before you release it to market, probably rule number 1 of deploying an app.....test!!!!!