You are not communicating with Apple when you post here. The Community is made up of we your fellow users, helping out as we have time and knowledge to contribute. You can submit comments and suggestions to Apple here:
Product Feedback - Apple
Note, however, that Caller ID and call rejection support varies widely among cell carriers world-wide, so there may well not be any way any phone manufacturer could make such a feature universal. Talk to your cell carrier; they may offer some sort of block on such calls. And you can, of course, set your iPhone to silence calls from unknown callers (that is, numbers not in your Contact). That's not a complete block since the call still comes through your service, but it can reduce such annoyances since the phone won't ring and callers are sent directly to voicemail.
Regards.