Your Internet and TV cutting out is one thing... your Phone. That's more serious. They NEED to fix your service. All three issues are probably one in the same.
Phone cutting out is more serious because of 911 service.
Stick with cable. It's the best... you just haven't had the right tech out to your house to make it work right. I think it needs to be escalated within Comcast if they've been out a few times with no resolution.
