Sansui
Sansui ctvscs21 sbr-cuu is very very bad

I was purchased the Sansui tv ctvscs21 sbr-cuu from the distributor but after 20 days the TV shows green and red spot on the screen in every 30 - 35 min sometimes every 15 min and sometimes 1 hour sometime 2 hour on daily basis i was complaint the sansui office 3 times first time executive come and said this is a voltage problem then after 2 months he rubbed the electric iron rod on the screen of TV then after 3 months he said due to atmosphere change the problem is create its solved automatically but the till date the problem not solved i think sansui is a brand name so why this type of problem coming in the Sansui products