Plannet fitness going agains POPI act

My personal banking details was ********ly given to zone fitness after my contract with them were cancelled. And they will not take responsibility of this. I am so angry and shocked to see that a national company will go against the POPI act! It's a disgrace and they need to do something urgently to fix this problem, which not only effected me, but other people as well. They sould pay for this and get a fine and make sure I get the biggest apologie ever or I will sue them for Not complying to a national act