Real bad service

I received a new phone with new number and ever since the number were activate continuously receive calls and messages from attorney's and other companies regarding outstanding debts, how do they give out bad numbers also whilst visiting the Northern Cape mall branch to exchange an incorrect supp**** cellphone cover the waiting time to process the cover were 46 minutes as it seem nobody knew what to do and the person whom had to assist were not in the shop apparently on his way but never pitched