516-730-2354

Me: "Hello"
Caller: "Do you accept credit cards?"
Me: "No.  Please do not call here again."
Caller: "I'll call your ass tomorrow Mr. Kendall"
(I was a little speechless)
Me: "Excuse Me?"
Caller: "I'll call your [***] again tomorrow Mr. Kendall"
Caller: Hangs up.

Caller called and asked if I accepted credit cards. I asked him who he was. He told me some credit card company. I asked him to put me on his "do not call list" and he replied "I will not!"

Caller called and asked if I accepted credit cards, I told him that we were going through our bank.  He went through a big spill about how they will hold our $, among other things.  When I told him that our bank did not do these things he replied, "all right [***]" and hung up on me

Received a call asking if we accept credit cards.
Told the lady "If this is a solicitaion please put us on your do not call list"  
She said sure
The next day they called twice, the first call was missed but showed up on caller ID as MSG.  The second call I told the man that I had requested the day before that the lady put me on DNC list.  He said "Mam, she did a terrible thing, she put you on a call every day list.  I will take you off."
Somehow....I doubt it.

Received call at 5:16PM EDT, caller ID showed as MSG. I answered with "hello", and all I got was an "aaaaaa", click.

Landmark Merchant Solutions
http://www.landmarkmerchant.com/home/contact.asp

For Customer Service & Statement Questions
1-866-606-1504, Monday through Friday, 8 am - 6 pm, CST

For Sales
1-800-882-4892, Monday through Friday, 8:30 am - 5:00 pm, CST

Schaumburg Sales Call Back
1-800-882-4896

Chicago Sales Call Back
1-800-266-2518

For Terminal-Related Assistance
1-866-606-1505, 24 hours a day

Fax Us
847-221-0403

Write to our Schaumburg, IL office
Landmark Merchant Solutions
2050 E Algonquin Rd, Suite 610
Schaumburg, IL 60173

Write to our Chicago, IL office
Landmark Merchant Solutions
70 W Madison St, Suite 750
Chicago, IL  60602

File complaint, easy, documented, fines:
Canada   https://www.lnnte-dncl.gc.ca/plt-cmp-eng
      US   https://www.donotcall.gov/complaint/complaintcheck.aspx


Other 800 note posts show call out on phone numbers:
516-730-2354
312-506-3688
508-638-6309