Consider getting a call blocking device or phone. For cells, some already have call blocking, others you can get free apps for. You can google them.
Report the calls here:
https://www.ftccomplaintassistant.gov/#&panel1-1
https://esupport.fcc.gov/ccmsforms/form1088.action
https://complaints.donotcall.gov/complaint/complaintcheck.aspx?panel=2