These NoProblemPPC people are the newest version of annoying unwelcome telemarketing.  You see above what happens if you miss the call.  I can tell you what happens if you try to take the robocall with the hope of preventing future calls.  The only options they offer are to receive more of their utterly worthless calls OR an insipid recording describing how to receive more such calls OR a referral to their website.  Go to their imbecilic website and you get to see how many ways you can receive more of their useless calls but no opt-out option unless you wish to rish engaging in e-mail traffic that they appear to prefer to interpret as a request to opt-in on their useless service.
Here is the solution since they do not seem interested in being professional or considerate.  Contact your local Better Business Bureau and complain.  Join me and contact your state Attorney General consumer services and complain about false, misleading and offensive telemarketing.  Contact the FTC consumer affairs bureau.  Let NoProblemPPC hire their own lawyers and PR to respond the way the red bearded IRS lawyer did.  He's now filing bankruptcy because of the penalties from similar complaints filed around the country with each of the above.  Play by the rules or face the consequences.