WORST BANK EVER

Once again i have Capitec bank calling me for one of their clients, i am not a customer of this bank but i keep getting calls. This has happened before for another client of theirs and took forever to resolve. Now i have another client of theirs with my number, HOW IS THIS POSSIBLE. I ask the call centre staff every time they call and do they do it, NO. Seriously irritating, i would never recommend this bank.