Obviously you have to knock the employees out with a tire iron and tie them up and hide them in a closet first.
Is that before or after you shoot up heroin and your school?
If you want people to call you, just post a few phony ads on Craig's List. If you want telemarketers to call, simply fill out those bogus "enter to win a car/vacation" entries you see at the mall.
If all else fails just post your number in the Call This Person forum.
MIB