Asus India — received defective product - need refund or replacement

I purchased asus fx504ge-en224t with serial number - j6nrcx03707424g from amazon on 20th march, 2019. When i started using my laptop i considered it to be in it's 100% condition because i didn't know any better but over the period of time i started observing decrease in the speed and suddenly my laptop stopped working approximately after less than 2 months from the date of purchase. I took the laptop to the asus service center - jsb computers jalandhar, punjab and mr. Jagmohan changed the motherboard saying it was completely fried. This is the first time i took my laptop to the service center and the motherboard, the main part of the laptop was replaced.

After this, the problem kept on aggravating, the performance of gpu kept on deteriorating.in games like in 'counter strike - global offence' i was getting fps of around 120-150 which declined to 70-80. Similar decline happened in all the other games. I performed a benchmark test on gpu which shows significantly less score as compared to my colleague's laptop who have the exactly same model of asus laptop. The score was almost 1/3rd of my colleague's laptop. Also my laptop was heating up so much that if i connected my pen drive for even 5 mins and took it out o[censored]sb slot i was unable to hold it. Because of these reasons i again took my laptop to jalandhar service center for the second time in the month of august.in the second repair they changed cooling pads saying that cooling pads had melted. I was told my laptop is in 100% condition and took it back.

After going home and checked the laptop after installing my softwares as the disk was earlier formatted i observed that all the earlier problems were still pertaining and again took the laptop for repair within a week. This is my third repair in less than 6 months. They told me that my cooling pads melted within 2 days - which is not normal. This time both motherboard and thermal pads have been replaced and even after 2 weeks in the repair center, i facing the same problem and the service center is unable to give me any kind of solution. My laptop is still in service center and they still haven't been able to identify the cause of the problem, let alone solve it.

Kindly note that in a short span of 6 months motherboard and cooling/thermal pads have been replaced twice. This is not at all normal, i spent around inr 80, 000 only to receive a defective piece.

I have sent this email to the highest level in escalation matrix only to receive this reply:
"dear valued customer,
I am sorry for any inconvenience has caused.

Dear jagmohan,
Please share update. Please resolve issue on priority. If need any tech support so contact to tech team. If any issue please let me."

Three days later, still no action or other response from their side, even when again an email was sent to them.