yell out in to the clouds really loud
do it in a crowded place
It is tough to get someone at Yahoo. They have email help at 800-318-0612 but the hold time is hours. You can go to help.yahoo.com and leave a message. Sometimes you can ask the community (in a new question) here on Answers and see if someone has solved your problem.
for which company? you dont tell
us which company you want customer service
Call them.