I get call all day long. I have tried to talk to them but there is no one on the line. But they keep calling. Sometimes every 5 min. in the morning.

A woman by the name of Leslie, keeps calling at least twice a day even on weekends

I had the same thing and found out it was a company called Emerge.

This is part of a nationwide attempt to get your financial info. and/or money. Sometimes they identify themselves as "card services" and leave a message to call back right away.  Other times there is no message left.  If you get a call from anyone you don't recognize, check this service (800 notes). I recommend you report this to the F.B.I. and police.  If you get one of these it will continue from other area codes.  This is a criminal attempt to misrepresent and get money or information.  The numbers that have called are:
336-903-6675
800-327-8622
714-551-5562
866-816-7018
801-666-6337
Once this starts, it continues and keeps going.  This has been occurring for over two months in my case, and each call comes from another area code the next day or in a couple of days, including the weekend, and up to after 9p.m.  Notify authorities about this. If they get old people or gullible ones, and no doubt this happens all the time, lives are being destroyed most likely.  How it starts I don't know.. but since I had a friend years ago who was a "telemarketer number supplier", I would guess that someone has gotten your phone number and perhaps your I.D. and is selling it to groups that use it.  I have terminal cancer from exposure to Agent Orange, which causes a condition known as chemobrain, and makes people open to suggestion.  Also, thanks to a couple of companies that have falsely reported that I owe them money, such as T-Mobile, and who then "sold" my debt to a collection agency, that recently offered to settle a false debt for $650+ for $50, these sorts of shady groups may be selling my and your phone numbers.  If nothing else, request full information on the company calling and if you get it, report it.  I saw a piece on 60 Minutes, I think, about a group on the East Coast, run by a former felon, that was using "debt collectors" to falsely threaten people that had debts with arrest, which of course is another lie and not possible by Federal Law and likely the laws of your state.  Since this scam is interstate, it is the job of the F.B.I. to investigate, and deal with it.  Since 60 Minutes put their investigation on the air, they actually did what they are being paid for - by you  and your family and neighbors!  Request the authorities notify you of what they find out.  You are their employer!