Hello, i have TX-SR605 reciever, i

Hello,
i have TX-SR605 reciever, i have had it 4 weeks and sounds awesome. unfortunately the remote control no longer works, i have replaced the batteries and the reciever light on the remote lights up but nothing happens on the amp. i believe the transmitter is ok but not too sure of the reciever in the amp, it started 2 days ago and would not adjust the volume level. i turned of the amp and back on and it worked again, this morning it switched on with the remote and then stopped working when i tried to adjust the volume, after another power reset, the fault still persists, plaese advise on this mystery. many thanks.