First of all you are best checking on the 'Service Status' option on your online Virgin Media account. This will list any known issues affecting your area.
If there are no known issues and all cables appear to be connected correctly then unfortunately it would probably require an engineer visit. You may wish to give Virgin Media a call or chat with someone on Live Chat to get this arranged. Virgin Media staff do respond to messages in this public forum but often take a week or so to reply, so this wouldn't be the quickest way to get a resolution.
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Sorry to hear about your recent loss of service, I know how frustrating this can be. Checking your connection I can see that you're back up and running now. Thanks again for posting, please let me know if there's anything else I can help with.
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