Rbox/tv Dereck sold me a device that has never worked properly since it was bought Tampa Florida

while attending the home & garden show in Orlando FL. I purched an Rbox for $235. It was promised to get every tv show ever aired, every movie ever made, all free and legal. So much for free, nothing is free. The box worked fine for the first 3 to 4 months. Then the problems started. Getting tech support was like pulling teeth. After finally getting a responce from rbox I was told it needed to be reprogrsmed. I sent it back with a check ror$25. It was returned and seemed to work as it was supposed to. That lasted 3 weeks, then there was no sound. The tv works ok with sound but when the box is turned on, there is no sound. After several text messages, and several phone calls I received a text telling me to replace the HGMI cable . My question is, how much more money do I have to spend befor thie thing will work as promised. Teck support is a joke,  Save your money, stay away from this.