Bose India — No service for out of warranty product

Address:

Flat 1A, Sriram's Sivananda Residency, Gauthami Enclave, Kondapur, Near Adarsh Cooperative Union Bank

I own Bose Soundsport True wireless and after couple of years the battery gets drained quickly. When asked the service centre to replace the battery. I have been told out of warranty products cannot be serviced and I need to exchange them with new one for which they will keep the old ones and give 20% discount on the new ones. Why would anybody spend 20k again knowing these are servicing challenges with the battery products.
I would want a better resolution for this complaint.
Thanks,
Ankush Verma
+91-[protected]
Hyderabad, 500084, India