Very bad service

Vodacom has this new idea of phoning you and explaining to you that you can safe on their cheaper data, “that sounds great my wife replies” going through the new contract my wife finds out it going to cost her R500 more now.. she immediately said NO but vodacom still continued to add it to her contract.They Will phone you 3 time I day to sell so ship but try phoning the about a problem you will never succeed.