If you are a business, you are not covered by the DNC list. Businesses making sales calls to other businesses are not required to screen against the DNC list before calling so even if your number is on it, that is meaningless.
Second, unless the call was a recorded message placed by an automatic dialer, it is not an illegal robo call. Automatic dialed calls are legal, except to cellphones, as long as a live operator comes online within 3 seconds of the call being answered.
Another one - business listing, they didn't say Google but then after hanging up on the recording, I received one immediately after from 814.414.4182. They never stop! It's so disruptive to business.
If you tell them to stop calling they'll put you on a do not call list for the number that called you. But an hour later they'll just call you from another number. It a scam company that claims they're Google but they are not. GOOGLE said they nothing they can do about these scam companies.