I have Call Blocker. How do I unblock numbers from this app? I have a galaxy a6

[Android Central Question]

I accidentally blocked my sister's number from my galaxy a6. I tried unblocking it by opening settings and finding rejected calls. But that isn't on there. Help?

 

[B. Diddy]

Welcome to Android Central! Which Call Blocker app? If it's a 3rd party app, have you tried contacting that app's developer?