Karbonn — about poor performance and availability of battery

Dear karbonn team, i purchased karbonn mobile A7 about 2 years ago. after 14 months o[censored]se, battery completely failed. the performance of battery was poor from the beginning and i find ur company's battery the worst in my experience.total charging time was about 6o to 80 minutes. but the backup was only for 3 hours if music was played. without music, wifi off and all battery conserving means applied, backup was only for a day or so. i deposited battery in service center in sonauli. it has been 8 to 10 months since i have ordered for battery. but i have been told that company is deaf to my complaints. the battery is not available and i have a dead set just reminding me of the bitterness to the behavoor of company. please listen to my complaints and give life to my dead set. sooner is better because i would regret less for loss of money. Please dont keep me in false hopes of your generosity if you cannot promise it from your customer and well wisher ...