Keeps calling my phone and not leaving messages.

How can  I stop this person frim callung my  phone I have triied call blocking apps and it still rings once now

Seminole oklahoma 74868 I have been harassed by this number for weeks I have finally not only downloaded an app to block the call but now I have looked up the phone number it seems to be a sprint tower...I don't understand the whole joke or fraud or what what's going on what is the point of calling somebody and hanging up that doesn't sound fun to me.I hope the police can do something about this

Will call and hang up if I answer my cell phone.  Sometimes I just hit the ignore button.  I have tried several times calling the number back to reach a different recording stating the number is not in service....sounds strange to me.  First time it was in Spanish, the last time the recording was in English.