Oppo - Low grade Products and faulty phones

These Chinese companies have occupied Indian cell phone and other electronic items sales in India and they are selling low grade and faulty products to the consumer and commuting fake promises at the time of selling which they never obey and give satisfied services to the consumers who are buying these costly phones and blaming the customers for the fault which is totally companies fault and not at all accepting that and even demanded more money to fix the problem which they have to do themself because at the time of sales they offer complete satisfaction and one month's time to replace the phone if anything is faulty instead of repairing it and a year long warranty for other problems but what exactly is happening they simply decline there fault and asking for more money from the customer who just bought a new phone **days back,even service centre and the head office also not responding first and then blame the consumer only....We all have to take a step in bycotting these Chinese companies who are earning huge profits from Indian market by selling low grade and faulty phones to innocent consumers.I felt this very bad just because of there physical and mental harrasment of these guys...Plz help me out and look into the matter asap..Thank you so much.