Calls from this number received daily, at least once. It is annoying. Can anything be done , to block the caller ? .Subscribed to "Do not call" register. Assume I should not be getting these calls

This imbecile rings several times a day and leaves a rumbling sound as a message.

Receiving daily calls from this number but never leaves a message

Complete silence

This is happening continually, we get this number phoning all the time and nothing happens if we answer, been caught twice now we dont answer it at all, have no idea who it is but it is bloody annoying

I called back number (07) 5657 0896 reached voice mail but did not say for what company.