Phoning is still the nest way to contact VM, however it's best to call first thing at 8am when lines first open, or mid afternoon/teatime.
You could also try the text messaging service. Just send a text with a description of TV Faults to 07533 051809. Your message will go into a queue and a representative will respond to you as soon as possible.It may take a few days.
The Service you do for others is the rent you pay for your room here on Earth - Muhammad Ali
Welcome to the community and thank you for your post. Apologies for the delay in response and to hear you've been having this issue with your box. As our community have advised you would need a replacement box.