Re-engage Call Companions Re-Engage Call Companions. A volunteer call companion calls the same older person between two and four times a month at a mutually agreed time for an informal chat. Calls will last for around 30 minutes. Freephone: 0800 716543 Email: [email protected] Who can refer? Anyone can introduce an older person to the service, including family, friends, social and health care professionals, day centres, churches and other charities. We welcome referrals from NHS link workers. Re-engage work with older old people who are over 75, an age group incredibly vulnerable at this time. They are often living alone or in sheltered housing with little or no contact with family or friends, and struggle to leave their house in normal times.