Bad after service from Samsung

Hi, all. In February last year I took out an add on to my Vodacom contract for a Samsung tv. As most people know a Samsung product comes with a 2 year warranty. Well in July this year the back light broke on the tv and after a struggle it was fix. Now here is the problem. 2 months later it broke down again 😪. This time it was completely dead. Again Samsung advised they will send out a technician to assess the tv. After numerous phone calls to Samsung and the 3de party that repairs tvs they informed me that the parts are not available and will exchange the tv. After contacting Samsung again to follow up they then told me to send an email, which I did. Again to no avail. It has been a month and a half and still no TV. I really don't know where to turn to now. Hope I can get some help.