This app doesn’t do everything I want!
You can always try another app, either instead of Simple Call Blocker, or right beside it.
There’s no rule that you can’t use multiple apps to block calls. For instance, you can use an app that maintains a list of spam callers to block that list, and then use Simple Call Blocker to block a range of numbers to prevent “neighbor spam”.
Remember, too, that iOS has ways to block calls that do not require a third-party app: