I do that all the time. If it's doctor's office and confirming appointment and start leaving message I pick up phone. I explain that if I don't know the number I don't answer. They understand I just tell them start talking if I'm home I'll pick up.
Hello Suzette, sorry to hear about your unwanted calls, good news is that you do have a blocking feature with your voice service through Exede. There are a few options to get this taken care of; you can call Exede Voice Customer Care at 855-463-9333, or you can send your account and contact info to firstname.lastname@example.org and we can get this taken care of as soon as possible. Thank you