Nokia Asha 200 — Nokia Care Service not Proper

Address:

Bardhaman, West Bengal

I went to nokia care to repair my mobile "Nokia Asha 200" where my 2nd Sim from it's Slot was automatically coming out. The representative of Nokia Care told me that I have opened from outside and he refused to rectify the problem and created the new problem. Earlier my Sim Card was readable but after they opened my mobile and 10 mins later they returned it, I saw that my card is not getting detected. Thing is that my mobile is in warranty period and I never went any other repairing shop to solve my problem. The people sitting at Nokia Care told me that I have to show the proof that you have not opened it from anywhere else then only they will rectify my mobile.. You please suggest me is it possible. I suggested them that whenever you are opening any mobile then put seal on the system so that nobody can open it, or if so happens then only you can say that we have opened it from somewhere else. I was forced to repair my mobile from outside. Please give me your suggestion how to make complain for such type of harassment. What will be the value of warranty period?