HP India — bad service provider

I really unhappy with your services.i have complain about my screen blinking issue but it is not solved yet.engineer visit is take place after three call at service center but engineer is lack of knowledge.i complain about it at service center but they don't register any type of complain they give me gujarat state coordinator number.but he did't receive my call.and also i talk with head of service center but he is not giving me any type of solution.and he register new case id.