Just in case you had cancelled or closed your Adwords account and were having trouble getting a refund from Google. Don't bother with "customer no-service". Try this instead : File a complaint with the Better Business Bureau. Go to www.bbb.org and file a complaint. Google always answers and will be on record with the bureau about your account. I got my refund in this way after all other methods had failed.
wao thanks for share this information i was in same situation but at that time i wasn't know how to refund.