This kind of calls are UNSOLICITED. If your phone number is in the "Do not call" registry like mine and if you never published it in a way that it could be easily discovered on social media (in other words: if it has been given for registrations only and it's hidden to users), you NEVER gave others permission to use it for any commercial purpose.
As other users wrote before me, I've never requested this company's services, even if in their voice message they "Believe I may want them". This is the typical philosophy of telemarketers: don't be fooled by people who write that these are "legit courtesy calls": they are NOT.
Know your rights and Law in general: Government is very clear about such conduct: https://www.fcc.gov/guides/unwanted-telephone-marketing-calls. As you can read, "A telephone solicitation is a telephone call that acts as an advertisement. (...) Companies and telemarketers must have your express permission to call. (...) If you receive a telephone solicitation that you think violates any of the FCC rules, you can file a complaint with the FCC."
You have the option of either add them to the reject call list of your phone (as I did) or, if you think these calls violate any of the FCC rules, you can file an online complaint with the FCC directly on their official website.