How do u recover deleted messages on Android phone?

Hello, i need help, I have mistakenly marked 3 important messages as “SPAM” on my Android phone, (Galaxy s6), Can someone please help me recover them and allowing future messages from those senders through? I cannot find these emails in my SPAM folder on my PC either. They have just disappeared. I need to recover them, thanks!

For issues/questions related to the usage of your phone, please contact your carriers technical support center.

This forum is for questions relating to creating a game for Android using Unreal Engine 4.

Thank you.

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