Dell India Private Limited - Damaged my product

Purchased Dell Inspiron **** laptop on **th November ****.
Product service tag no. **HKYN*
Got the worst customer service with Dell. People here are to make fool out of others in every way possible. I faced an issue on July **** registered a complaint but the issue got automatically solved so cancelled the request. But after few days again faced the issue so registered a complaint and after some days engineer visited on *th August ****. He said the part is needed to be replaced but I did not want to because it this was my new one within warranty. Before the visit was done I had called multiple times on customer care to check if I can get the replaced unit and not the part but some simple replied that that part is not available as of now but as soon this available, the engineer will reach your house. This information was given by the executive in call and immediately as if they already know about the unavailability of the parts. Rubbish. Now, when an engineer visited he replaced the part but even though the issue was not solved. So he contacted dell service care and the person named ISAAN informed the engineer to give him a number on the motherboard. But on my surprise the number that executive needes was on the daughterboard. Now the best thing happened after fixing the motherboard my laptop stopped working completely. On complaining about the damage that was done by Dell guys I get amazing replies like"Hum Sirf saare part replace kar ke denge ab aapko service lena hai ya nahi??" Rude and nonsense. I asked Himanshu Bhatia (Dell EMC | India Consumer Escalations) that even I agree with you guys to get my laptop's parts to replace if I'll again face the issue what is the guarantee and at that moment I want the new laptop and no replacement. To this, he replied we won't know tabhi kaunse part m issue hga and we'll replace it.
I want to make one thing clear the opening if the motherboard and everything was done without my consent nobody asked me that they have to open motherboard and stuff. Here, I am clear the damage has been done by Dell side and in return, I get rude replies and not a single per cent of support. I want a newly replaced laptop that it. I am not a fool here spending **k on the laptop to get replaced parts.