freezing, channel dropping and difficulties loading.

I am not seeing recent posts for this but I'm having same issue of freezing, channel dropping and difficulties loading. I spoke to TW and was told it was an application issue and given another number to call. That number was to Charter/spectrum who couldn't help because they haven't taken over my area yet and couldn't even pull up my account. I was referred back to TW and after several attempts with long hold times I was told it was not there problem. They provide Internet which is obviously working but their responsibilities end there. The rep kept repeating this, even after I tried to close the call with "good bye". I finally had to hang up on him because he kept repeating himself. Don't know what that was about but I don't have any other Roku channel issues. Any advice from anyone?