Whois information for both of those sites list the same person and address.  I would suggest you send them a certified, return receipt letter telling them to stop calling you and telling them that you want a written copy of their do not call policy as required by law.  Then sue them for TCPA violations, $500 per call, possible treble or actual damages.:

Domain Information
Domain:
nationwidesettlement.solutions
Registration Date:
2015-10-16
Expiration Date:
2017-10-16
Updated Date:
2016-12-05
Status:
clientDeleteProhibited
clientRenewProhibited
clientTransferProhibited
clientUpdateProhibited
Name Servers:
doug.ns.cloudflare.com
lana.ns.cloudflare.com
Registrant Contact
Name:
Jeffery Barber
Organization:
nationwide transfer llc
Street:
767 n. 20th street
City:
ozark
State:
Missouri
Postal Code:
65721
Country:
US
Phone:
+1.4175936984

americansettlement.servicesUpdated 1 second ago
Domain Information
Domain:
americansettlement.services
Registration Date:
2015-10-14
Expiration Date:
2017-10-14
Updated Date:
2016-11-28
Status:
clientDeleteProhibited
clientRenewProhibited
clientTransferProhibited
clientUpdateProhibited
Name Servers:
ns11.domaincontrol.com
ns12.domaincontrol.com
Registrant Contact
Name:
Jeffery Barber
Organization:
nationwide transfer llc
Street:
1420 S Enterprise ave Suite E
City:
SPRINGFIELD
State:
Missouri
Postal Code:
65804
Country:
US
Phone:
+1.4175936984
Email:
[email protected]