Selling my info is against the law!!!

These mofo's I don't even know got hold of my contact info (against the police act law in sa) and sold my info to a bunch of other companies like Mr price (stated they got it from you guy's) .... my phone has about 20 blocked calls a day ... I tried phoning them however the call immediately drops when wanting to talk to a agent which is super annoying is any one else in the same boat as I feel like taking futher steps regarding this ...