My statement was sent to a third party intentional

I am still failing to understand why and how african bank intentionally sent my statement to a third party iv been calling them they send me from one callcentre to another i spoke to a team leader in collections she said shel get back to me its been 2days now,who sent my statement to a thirdpary and who gave them the right to do that i demand an answer from african bank asap or i will open a case againts you,report you to the ombudsman man il do anything to get to the bottom of this.