How long is a piece of string? Depends on what the fault is some can be repaired in hours others (like the Motorola issue) can take months.
If India have been truthful you could check the service status page in
https://my.virginmedia.com where more details should be available. Failing that if you ring in the morning just aftyer 08.00 you should get UK support. You'll get more sense from them.