Switched from Dish Network to Cox Digital Cable Issue

I had/have Cox internet and had Dish Network for television and decided to switch everything over to Cox but cannot get a signal to the the Cisco boxes from Cox. First we were informed that a tech never switched the service on at the box outside our home but now that they have done that we still cannot get a signal to the boxes. So I decided to have my husband try and connect one of the boxes to the coax line used for our internet and we get a perfect signal. Has anyone heard of this happening or does anyone anyone have any ideas/suggestions as to what could be causing the issue in the other rooms of our house??

Everything worked fine when Dish was activated. My problem is that we have been dealing with this issue since the end of April and are being charged for cable tv that we have not been able to access. I'm disabled and pretty much confined to bed so letting a tech in to try and figure it out just hasn't been an option as my husband works when a tech could come out. Any insight, suggestions, or ideas to try would be greatly appreciated as I get a different answer/suggestion/potential issue every time I call tech support and obviously none of their ideas have worked. Thanks in advance for your help.