Hisense TV

I bought a Hisense 55" smart TV from PnP September last year. 31/10 only 13 months later the screen went black. I gave it in at PnP on 1 November and have not seen the TV yet. They told PnP it was repaired and will be delivered 28/11 but it never came, then they said 29/11 it is on the way. Now they say they have lost the TV and also do not offer any further solution. So I have been without a TV for over one month, with no end in sight.