Is this a scam? How do I stop the calls?

Haven't had experience with this company, but you can stop calls you don't want by calling your telephone provider and explaining the situation, they will be able to trace the number that keeps calling you and block it so they can't call you anymore. You can also request to be ex-directory so these companies can't find your number to hassle you! Also avoid putting your phone number in websites and things you sign up to as they can often sell your details on and you get unwanted calls as a result!