Hi @Émile
Welcome to the Roku Community!
You will need first a remote to set up your Roku TV. Each Roku TV manufacturer provides direct support and warranty services for their products running the Roku OS.
In addition, Insignia Roku TV remotes are solely manufactured by Insignia. They'll be the best ones to help regarding your issue.
You can contact them here: Insignia Support. Call them at 1-877-467-4289.
Please keep us posted on what you find out.
Warm Regards,
Lianna