Vijay Sales — Elica chimney installation process

Hello, I purchased a chimney from elica as suggested by the sales person in vijay sales and it was delivered to me next to next day then for installation the technician should have came the other day as informed by them no after customer service no follow ups i was the one who has been calling them continuously no one is listening to me they are telling lies and it has been 10 days and chimney has not installed yet. Now i want to return my product now can’t tolerate this anymore.