Confer with customers by telephone or in person to provide information about products or services, take or enter orders, cancel accounts, or obtain details of complaints. Check to ensure that appropriate changes were made to resolve customers' problems. Keep records of customer interactions or transactions, recording details of inquiries, complaints, or comments, as well as actions taken. Resolve customers' service or billing complaints by performing activities such as exchanging merchandise, refunding money, or adjusting bills. Complete contract forms, prepare change of address records, or issue service discontinuance orders, using computers.