land line not taking messages

Have had a land line with Xfinity for many years. [Edited: "Personal Information"]. Not taking messages.When I try. to retrieve messages, Bottvsays dont have this service which I have been paying for for a long time.

Also can call out but incoming calls seems to have notably decreased. Noticed change for several weeks since my Xfinity package has been upgraded. Tried many time to call Xfinity directly but wait times are extreme.