OnePlus India — Product Installation

Address:

Hyderabad

Hi There,
Recently i purchased one plus 43" TV in oneplus website
ordered on 5th, Dec 2020. Received on 10th Dec.
I requested for installation from customer support.
they replied it will done in 24-48 hrs.
now 15th of Dec no one is called me regarding.
every day i am updating to customer support no one has come.
they are asking again wait for 24-48 hrs
now its 3rd time.
can any one give idea what should i do these kind of situation,
i really feeling that i purchased worthless brand.