Caller: Raisers Hub (apparently)

Rang the number back, voice message said "Thank you for calling Raisers Hub" and hung up. Raisers Hub looks to be a Sydney-based telemarketing company coordinating fund-raising telemarketing for not-for-profit organisations. Company seems legit, has website, facebook page, Rosebery address. But this phone number is not the number listed on their website, and mobile flagged it as suspected spam - may not be genuine or safe. If you want to donate to a charity, it's safer to contact them directly yourself than via an unsolicited call like this.