ABSA INACCURATE CREDIT SCORE WITH TRANSUNION

I have opened an account with ABSA recently they have been treating me well especially some if the departments. However this complaint is for the BANKING APP department. They always have inaccurate scoring . They state that they provide scoring according to transunion but when I contact transunion my score is far higher every single month they score me inaccurately and not according to the Transunion Bureau. I have been retrieving my score from transunion and ABSA CREDIT Couch score defers from Actual credit bureau of Transunion of 713 while ABSA always has my score between 589 or 601 claiming its according to Transunion which is false. My score has always been over 660 according to tranunion but ABSA credit Couch is never accurate on my app. This could easily effect my ability getting facilities on the app with inaccurate scoring. I called the Banking App department many times wasting my money on calls they keep telling me that they are not sure why and I should hold on then they put me on hold going to over 40min with no feedback. I Keep wasting airtime and time during work. ABSA really needs to sort they banking app out. If ABSA had to call transunion themselves they would see for themselves how inaccurate they Credit Couch section is on the app and is definitely not according to transunion score as they claim . They need to sort there apps out or there scoring system. Up until to this very day they cannot provide a reason or justification on my score being low all the time putting me on hold repeatedly. I would like to switch my salary over but ABSA is just not accurate on providing accurate information from credit bureau mainly my score from transunion which most recently is 713 far from what they claim is from transunion. I will continue using my FNB as the main account for my salary until they resolve this issue