simswop done on my number

im so unhappy with vodacom SA , my bank app has been blocked because some1 tried or did a sim swop with my number , ive been trying to get hold of vodacom for the past month but with no luck ,they always direct me to self service wich doesnt help me with my quiry i need some1 to verify if some1 indeed tried to simswop my number so that the bank can unlock my app. im frustrated.