Try disconnecting from the mains and restarting.
If that does not work, you will need to do a factory reset from the menu which should restore them.
You will need to add any apps you have previously selected and sign into the 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).
