Do you have a TiVo or a V6? If you're not sure, check here
The TiVo is an old box and does struggle with many of the streaming apps, but many problems are down to the internal internet connection dropping - do you get any flashing green lights on the front-left?
Broken pictures on live TV is a symptom of a signal fault - reboot the box once, then call in and report your fault. 150 from a VM phone, or 0345 4541111 from any other phone.
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