Ok... One broadcast channel carries: Sky Sports PL HD, ITV-BE HD, Sky News HD, BT Sport 2 HD, Nickelodeon HD, MTV HD & Sky Nature HD - so you've all but confirmed a signal issue 🙂
Once there is a fault (wherever it is) affecting that particular frequency, it tends not to go away until it's resolved. Whether it's your box or the cabling somewhere, is speculation without VM investigating.
VM faults are open & available, but have a few issues at the moment and this does occasionally mean the "call centres are closed" message pops up. Sometimes you can get an automated diagnostic check that will try to resolve your issues remotely. This can be a blessing and a curse - it can sometimes diagnose sufficiently to book an engineer or box replacement for you, other times it can refuse to put you in the queue until you callback after its fix fails.
VM staff work through posts on here, but it's currently taking around a week. Personally - keep calling 150, and be patient until you get through. No amount of resets will solve this, it either needs an engineer or replacement box...
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