Hello @NancyN04. We have a specialized team that supports our Facebook ads and they will be able to assist you with this. They are available at 1-855-816-6502 Monday through Thursday from 7am-11pm ET and Friday 7am-9pm ET. You can also email them at facebookads(at)constantcontact(dot)com.
You can run your Facebook ads directly from your Facebook account and cut out the middle man.
They usually give you a range though, for instance 6000-10000. They don't guarantee a number and I doubt CTCT can either as they are just accessing their system as a 3rd party.