Telefunken TLED-58FHDB TV broken in less than 8 months and no communication from the retailer

I bought a Telefunken TLED-58FHDB on the 15th of June 2017 , on Monday the 29th of January 2018 while I was watching the it went blank with the black screen. On Thursday 1 February 2018 I took it back to the shop to this day they have not contacted me to let me know what is actually happening with my television. I find this behavior very unprofessional and *********** , first thing they sold me a television that is faulty and my money is sitting their bank account and counted as profit i have been without a TV for more than 2 weeks and to them it feels normal. I even contacted the customer care center on their website to this day they not contacted me . I am very disappointed and will never buy from them again.