I can make calls send texts but no one can call me just says the person you are calling cannot etc etc samsung s8
Could it be mast signal issues where you are or a sim card issue @Jay2254
As a process of elimination can you try your sim card in another phone then accept calls.
If the calls are then fine it might be beneficial to use a Samsung Service Centre.
Current Phone ~Samsung Note 20 Ultra 5G SM-N9860_256Gb SnapDragon 865+ Samsung One Ui 3.1/ Android 11.