HCL Me Tablet — Bad services to customers and dont resond on calls

i have purchased a laptop from hcl. and it is totaly waste, i go to service center of hcl in gurgaon at udyog vihar and meet to Mr. Vijay andi gave them laptops and complaint that it is giving blue dump errors and its bluetooth is not working and we cant install windows on it easily due to blue screen errors. and he assured me that they will change its hard disk and will return it to me within 7 days and given me a receipt.
and after 7 days , i keep calling him and they did not respond to me some times and some times when he pick my call he said that it will take some time and approx. 15 days later , he returned my laptop by saying that they have replaced its hard disk and bluetooth is fine now. I replied ok. and then after 3-4 days it again start giving same errors and when i call him , he did not pick my call and one more thing that i will like to disclose that their delhi customer care/call center department never pick calls. i called them many times but they dont pick and phone no.s of service center of ludhiana, are not working. please help me. or contact me on [protected] thanks