Remote only works intermittently

Contour recording gave me problems after recording it would not play back. I got a new unit and after having a Tech  out to the house to "fix signals" and the Tech spent 4 hours and Tech center spent another 2 hours resetting the unit. I received a new remote which worked for almost a week, now the contour unit will only respond to the remote every now and then. I tried another remote and it is the same problem!

 Any ideas or do I have a service call again?