3g data offer not activated

Location/place: delhi

Name of company/service: vodafone

Had bought a galaxy grand on 23rd of march and called up customer care for activation of free 3g offer. promised activation on 2nd april, not done, then called up again and assured activation on 4th, not done, complained and then assured on 5th, then 6th, still not activated. spoke to senior management called Mr. Deepak kumar and Mr. Anil who assured me. But not activated yet. Why do you cheat customers like this??