If it’s the cable from the omnibox to the internal box it’s an easy job. If it’s the cable from the omnibox to the street box it’s much more problematic. There will probably be a fee of £25.
The primary place to report faults or for service requests is Customer Services on 0345 454 1111/150 if you have a VM landline or wait two or three days for a VM staff member to get to your post.
Tudor
There are 10 types of people: those who understand binary and those who don't and F people out of 10 who do not understand hexadecimal c1a2a285948293859940d9a49385a2