Hi @horseriderdeb ,
Try removing/deleting the contact from any call history and your contacts list so there's no sign of it on your phone and then ask that caller to ring you and see what happens.
It is still is rejected and you don't have the spam caller setting toggled On in your phone app: Phone> Menu (3 dots top right)> Settings> Block numbers> Check if the number is there.
If this is not the case, as a process of elimination can you try your sim card on another phone and then see what happens. If it continues then you'll need to contact your network provider