Lenovo — Lenovo mobile problems

Address:

495682

.
Dear sir,
I am facing problems with my lenovok3 note mobile since date of purchasing. I have also visited on uthorized lenovo service centre in bilaspur city. But they are also failed to shortouts the problems associated with mic & software. Since date of purchasing to yet now, i have visited lot of time in service centre but they are working temporary. Whenever they are working on mobile its work well but only for short duration. Again after some times its doing same problems. Its happents lots of time but today my 1 year service warranty has expired but still doing same problems please help me as soon as possible.
Name - vimlesh singh
Mobile no - [protected]