Unknown number calls, though never leaves a message

Caller: Cleaver contacts - onbehalf of the RSPCA

Klever contacts

I've been getting daily calls from these numbers starting in 0480 094 XXX. They never leave voice mail. Blocked.

When i ring this number back they say they are "clever contacts and they are ringing you on behalf of a charity". But they never leave a message and are very annoying. Ringing everyday now for a month.

Caller: Don't know

Didn't leave message, phone provider says suspected fraud.

Keeps calling but no message left

Caller: No caller ID. No message.

Calls multiple times a day. No message left. Suspect spam.

Caller: Clever contacts

Calling on behalf of a charity

Caller: Klever Contacts

It’s Klever contacts. They won’t stop calling!

Called and hang up after hearing “hello” from me. Were they after a female voice?

Phone said 'suspected spam' when it rang. Usual 3 rings and a hang up. No message as usual.
Block number.
NEVER ANSWER THESE.

Caller: A charity

I called back the missed call and it was just a recording saying they were calling on behalf of a charity which they represent.

No message left

Unknown caller, no message left so suspect spam

called and left a message saying "where did you come from, where did you come from, where did you come from".

Caller does not leave a message.