Xiaomi India — Complain in Redmi prime 9

Address:

Indore. invoice attached

I bought one Redmi prime 9 phone from Darshita aashiyan pvt limited via amazon on 1 dec 2020 for my son. The phone started trouble within a week. Unwanted keys get operational and creating problem. Back key starts automatically. When try to type any thing ## key type in automatically. Pl look into