Understand this first requires an understanding of who's involved in your workplace rehabilitation journey.
There are many parties involved in the workplace rehabilitation process, which we break down for you in this article: Who does the injured worker's support team consist of?
While your support team is expected to communicate thoroughly with each other, each party oversees a specific aspect of the process. For example, your insurance case manager would be in charge of questions related to payment and approval of services.
Having multiple points of contact is therefore part and parcel of the process. Keeping a record of the people reaching out to you as well as their contact details can help.