where can i get the shaver serviced?

Much will depend on where you live and the make of the razor.

In the UK for instance this site may be useful...
http://www.shavers.co.uk/shavermaintenance.php

There may be other places - I couldn't be bothered to do any more searching for you.

On YouTube there are videos that demonstrate razor maintenance like this one...
https://www.youtube.com/watch?v=rGD84BfKxAE
Ditto any more searching.

Good luck...

Peccavi
February 2013