Capitec was one of my best Financial institutes but no more

sometime in November 2019 i went into the branch to change my cellphone number as i lost my other phone, only to find out that my account is frozen, the consultant who was so kind and sympathetic towards me due the ***** department saying they have an expectant ***** on my account. Well all was well until i was told to produce an affidavit which i did went to a branch closer to my place of residence and when the consultant phoned the department who handles such cases all that was communicated to the consultant at the branch was that they never want to do business with me ever again. until this day they can't tell me what happened