Hisense smart tv

I bought two smart tv's from a supplier. I have been having endless problems with the unit. Everytime I need to reset and login again to Netflix. I contacted the supplier who informed me that it is a software issue with hisense and that I need to continue to reset. It has now becoming frustrating reseting the units eveytime I want to watch. Hisense indicated I should contact the supplier. Now the supplier says I must contact hisense. They can't do anything... I need a solution.