Faulty Goods/ Repairs sucks

I have bought a Tv from the store and the TV has been in for repairs several times. The TV is a month at my house then back again for repairs for 3-4 weeks. The Lenasia branch Supervisor is very Rude Petunia even the manager. The just refuse to replace the TV. This has been going on for months now. I even made contact by reporting it to the helpdesk whereby I leave messages for Cindi with no return of calls I just have to call none stop She is also not helpful. The store even knows us by name. Even the repairs guy Eric knows us.