Usual scumbags with the usual slimy scam. I always give them the attention they deserve (as in zero).
IF I am in the mood I will string them along with [***] for as long as I can then blow them off.
There's one call center with hundreds of different numbers they use for outbound dials so it's literally impossible to block them. I managed to get the calls to stop by answering the phone in Spanish. I haven't received another call since! Just answer "Bueno?" and when they stammer say "Hablas espanol?" they'll quickly Google translate asking if you're a business or a house so say "uh, uh no negocios, es casa" and hang up. Worked for me!