Boat - Boat sound bar not working properly

I ordered boAt Avante Bar ****D *** W Bluetooth Soundbar on **-**-**** and invoiced in **-**-****. Initially the sound bar performs well but soon it shown some malfunctioning. In Apr **** the speaker shows some problem like sound increasing and decreasing automatically and also Bluetooth connection issues there by i raised a ticket (ticket number :- *******) on Apr **th ****. after that the technician from "Imagine Mrket" is checked and rectified the problem is due to problem of the internal "Board" of the "sub" and ordered the new board and it's come after * months later after that issue is resolved in Jul Month ****. But now after * Month later again the sound bar shows the problems like first Sub not working then one speaker not working after that sound bar not working now currently only one speaker is working like a radio. I extremely dissatisfied with the Boat sound bar. So, I request you to please Get refund / replacement the damaged one with new one otherwise i need to repair the damged one with free of coast.