Barnard

Hello, I've come here asking for some help, because this cheap Sannce system i have is driving me crazy, but im trying to make it work. Sannce N44SU NVR + I41CC cameras. Daily video loss events that last 5-10 minutes each. Random channels, Random times. (Replaced the ethernet cables and still no good) HDD not being detected or error status. Sometimes it will be healthy for a few hours then error. I have scanned in PC, initialized, formatted etc. Factory reset does not help either, along with changing power supply. I realize this was cheap so i want to upgrade my NVR to something decent and use Sannce cameras, but most say not compatible. Does anyone know of an alternative and reliable NVR that will work with these cameras??? (location Australia) Cheers, regards Jake.