Login to your service provider site. Find the list of calls. Right click (or left click, depending on the site) and select "block" option. After that, they can never again call you. Hurt them where it hurts the most by blocking them. It is free.
Login to your service provider site. Find the list of calls. Right click (or left click, depending on the site) and select "block" option. After that, they can never again call you. Hurt them where it hurts the most by blocking them. It is free.