Ambrane India — After many promises this company not replacing the product

I purchased a powerbank of this company through flipkart in october 2015. They have delieverd me a defective powerbank after 20 days o[censored]se it started giving problem and powerbank was not working. As i was out of station i was not able able to replace powerbank in a month from my original address. After that i asked this company to replace me the new powerbank. But since that day i have send this product 4 times. Every time the technicians send me the product in the same condition. Even after promises since last month of replacing me the product they have no intention to send me the product and even after gain and again mailing them.