You can add the phone numbers you want to reject the calls from to blacklist.
Go to telephony settings: Main menu — Settings — Integrations — Telephony and add the phone numbers to blacklist in tab "Advanced":
APRO CRM is a SaaS cloud solution and is hosted by our servers. The CRM is flexible and can adjust to your business needs. You will be getting all the necessary assistance from your personal adviser while using the system.