OnePlus India — oneplus 7 -6gb-128gb not working properly

Address:

Ghaziabad, Uttar Pradesh

Bought one plus 7 on 04.09.2019 from m/s vijay sales store in ghaziabad, u. P. Vide bill no. Urn-s-si1378. The issues observed using the phone are: (1) low clarity while talking on speakers at a distance. The other person is not able to hear to what i'm trying to communicate and i need to repeat my conversation again. (2) while talking over the phone, if i get a call which goes in call waiting, my existing call at times gets disconnected. (3) the volume is too loud while talking over phone. Any person sitting next to me is able to hear my conversation over phone. I'm facing lot of problem due to this issue & need resolution/ replacement of phone on priority.