Dell India — Company not providing with a permanent fix for laptop

I own a Dell XPS 15 and I bought the laptop in 2019. I have had to replace the motherboard on my laptop five times within a span of two years. After the repetitive nature of the faults that arise at certain time intervals in the motherboard, the company keeps on delivering a temporary fix by replacing with not even new, but instead refurbished motherboards which keep on failing after an average of 5-6 months. All I demand is to get the laptop diagnosed, not just blindly keep changing the motherboard and replace it with a new one instead of a refurbished part.