Sony India — tv volume fixed

Address:

Plot no:302,6th block,DivyaSree sakthi apartments,Mayuri nagar,Miyapur,Hyderabad,500049

My sony bravia tv volume is fixed to maximum 100 and i’m not able to adjust it, its asking me to long press the volume button but it’s not working, i’ve reset all the cables, reset my hd box and all but it still isn’t helping, please help us, there is no issue with the remote too as the buttons are working as the volume is going down with it but soon it’s increasing to maximum, problem might be my audio out or something but i’m not able to rectify it. I request you to assign a person to resolve this