Nokia 3230
Misbehaving customer care executives!

I have been using a nokia 3230 handset since 8th aug. I once went to customer care center in noida sector-2 to get my cell repaired. There was some minor problem with my handset. But when i received it back, i found out that it had a part not working. I went back to then to make a complaint, and they told me they were sorry for that and would repair it within 1 hr. So they kept me waiting for 1 hr and when i approached to their desk for receiving the cell then they told me that the part is to be replaced with another one which they don't have right now and will arrive tomorrow. So i came next day, and asked for my cell, but again they made an excuse and started making me wait and when after 15 days i didn't get my cell back then i demanded for a replacement. But i didn't get it at once. And for more 2 to 3 days i went there continuously and after so many efforts they game me a replacement for my cell but they did not update it on the internet but they did so on my bill with a stamp of nokia care. the replacement which they gave to me was a 3 month older cell than what i purchased. But when i went to them for the next time to get my cell repaired, they told me that they didn't made any replacement considered to that imei no. And when i showed them the bill with a replacement proof on it, they denied it. I told them that it had a stamp of nokia on it, so then they decided to make a manual jobsheet of my cell. Since then my cell is never repaired completely an every time i make complaints about my cell's problem they never rectify those problems. I have got my cell's amc done and went there once since then but then too they didn't rectify my problem. From then i have left the hope and i m using that cell with all those problems and i got use to it. But till yesterday i tried to connect it to internet and i got freaked out facing so many problem and so i decided to complaint. My cell is not registered at internet that it had an amc done but i have full proof of it. What can i do at this moment. Please help me out smb!