TTK Prestige — Hob top stove under warranty which flame worst and smoke like firewood stove

This is safety issue too..
We have purchased Prestige 3 Burner Hobtop, during August 2021 and still the product is under warranty. From Last year onwards we are continuously giving complaint that the burner burning like firewood stove (Yellowish flame) and making all the utensils completely black. the flame not in consistent manner, feeling this as Safety issue and seeking support from Prestige team for repair, more than 5 times the service team had visited our home. Also, during recent service, they changed Burners and found not getting changed. No resolution till date. I am kept on complaining with the customer care but No resolution till date. Nowadays in our home we started hate this product as it is making us afraid towards safety issue. Need your support to resolve the issue. Request to replace the product as more than 5 times it serviced and unresolved. Attached Current flame condition and Utensils level after flame.