Boult Audio — Faulty product want to get new device

Hat have you done, wasted my money. It's still not working. The issue is as it is. ??????????????. I am so angry on you. It's one(right side) is still not working. What have you done. Why did you asked me to courier you and wasted my courier amount and this device amount. Better you me new replacement device. Brand new. Or else I will raise a complaint against your company. And I am damb serious about this. Don't take this email lightly. If you don't reply or ignore this email, or if I get any other excuses from you. Then I will raise a complaint. Now send me new replacement device.