Hi

I work for Vodafone and can help.

As long as the phone was bought from Vodafone and is in warranty, any
Vodafone store can send it away to be repaired.

The timescale can vary although it's 7 days on average, and you can
track the status of your repair online. Wherever possible, the store
will give you a loan phone during this time.

If possible you should also back up your contacts and anything you
don't want to lose and remember to take out your memory card before
you send it away.

Hope this helps.