Vijay Sales — Defective Tv received

I purchased a one plus tv from vijay sales chakala store and received a defective product. When asked for replacement we have to wait like for 8 days including continuous calls to customer care, multiple requests to send the technician for installation.
And also when the guy came to take the old tv he could not remove the bracket behind the tv which is used for installation it on the wall and hence took the bracket with him for which we had paid 300 rs.
Now when after such tiring requests installation guy again came to install the new tv and asked us to pay again the 300rs.
We called vijay sales and asked them to give us our old bracket and they denied us, shouted on us that they did not take the bracket with them.
Its ridiculous thing for such a big seller to lie just for 300 rs and later when we strongly tried they agreed that they took the old bracket with them and promised us to return it back to us.
Still we are waiting for that bracket to get it returned to us and installation of the tv since last 10 days. Such a pathetic after sale service as they received the wholr amount and stopped responding our calls