If you have a computer, you can recover deleted messages from Samsung via
Gihosoft Android Data Recovery Free. It's a professional Android file recovery software. With it, you are able to recover deleted text messages, contacts, call logs, photos, music, videos, WhatsApp messages and Viber chat history from Samsung, Huawei, LG, HTC, Motorola, Google, Oneplus, Sony, Lenovo, ZTE as well as other Android devices easily. Next, I will introduce how to retrieve deleted messages on Samsung with Gihosoft Android Data Recovery.
Samsung SMS Recovery How to Recover Deleted Text Messages on Samsung