Dell won't replace system

I purchased amdrizon gaming laptop On February 27th at GBS System in Chennai. Within a week on March 4th, the display developed lines and reached  Dell support  where I got  a replacement laptop, which arrived after waiting for 19 days - on March 23rd. However, to my extreme disappointment, the replacement laptop also malfunctioned within two weeks - on April 4th. This time, the system wouldn't boot past the Dell logo and experienced significant overheating. I contacted GBS Systems, the retailer, and they asked me to bring the laptop. A Dell update was attempted by them. The machine turned on finally. After exactly 2 weeks, on April 19th, to my shock, the same display issue and overheating  issue recurred. The machine won't start. I contacted GBS systems, again they asked me to bring the laptop. They tried starting it, but it never came back. The display is blank. This is a clear case of me receiving two faulty machines. I had purchased the laptop for my work purpose and Dell has totally failed me. 

It has caused a lot of stress to keep taking the faulty laptops back and forth. My work is also affected to a great extent. For Rs 10600, I deserve a fully functional product. I believed in the standard of Dell and invested so hugely and this entire process has left me in despair. Instead of doing my work, I have been forced to talk to GBS or Dell customer support back-to-back because of these faulty products. This is completely not acceptable and I have lost my confidence. I feel deceived. After multiple mail and phone calls DELL stubborn on repairing my brand new laptop replacing motherboard rather than  replacement.