jimmy challinor

i have a problem eith my infotainment system it keeps turning itself off and then back on again been back to vauxhall twice first time software updated didnt work then they said they will replace the system worked for a few months then back to turning off back to vauxhall and now out of warranty they are saying the screen was replaced but not the radio and the radio is out of warranty as it was not replaced at the time can anyone give me any advice on what i can do ?