I've moved your post to the TV-V6 board, you'd posted in the "chatter & natter" section which isn't really intended for support queries.
Pixellated pictures on live TV are often the sign of a signal fault. If you've rebooted your box once, then there's likely a fault somewhere, so this will need VM to intervene. You're likely to need either an engineer visit or a replacement box, depending on what VM's remote diagnostics turn up. These faults are not anything that can be fixed remotely, if a reboot hasn't worked.
First check the automated faults line for any existing issues in your area that could be the cause: 0800 5610061. If nothing's reported, assume VM don't know about your fault and ideally you'll need to call them.
150 from a VM phone, 0345 4541111 from any other phone - choose the options for "I have a fault with my TV service". Alternatively you can wait on here for staff to respond, which may take a day or so.
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Re: tv picture breaking up and keep losing internet connection.
Hi @wendybonas1 thanks for posting and welcome back to our community.
I am sorry to hear that you're having TV and intermittent internet connection issues. I have had a remote look from here and can confirm there is an issue in your area. It currently has an estimated fix date/time of 3:00pm today. Please can you keep an eye out and get back to us after this time with an update?