Tata Docomo — Customer Care executive harrasing

Address:

Karnataka

I am a Tata Docomo user, I had some doubt in tariff plan, so i called the customer care to clarify the matter, the Guy who attended my call though spoke nicely and clarified my doubts, but later he midnight he started sending msg's making clear note of my name and phone no. How i know it is the customer care guy? he himself mentioned that. Now, often he is torchering through msg's abusing me.

Are customer care people there to help us or to harass us?
i do not know that guy's name, but his phone number is [protected]. PLS can anybody help me.