Are you getting them with a direct aerial feed on your TV?
TalkTalk don't broadcast the channels so can't be blamed for signal issues or changes to broadcasters. Channels do change over time.
It's probably the weather, but check the Freeview website to check what stations you should get, or if there are any maintenance issues in your region.
If an app isn't responding, then I'd try a factory reset to the box, but this does mean you'd have to sign into apps again.
Please remember to mark Solved Posts with Best Answer. Doing so helps other customers and saves TalkTalk's Support Team time by only looking at unsolved topics. Thanks, Steve (a fellow customer).
