Caller: Clever contacts

Did not answer - they did not leave a message - when I returned the call it had a recording saying they were Clever Contacts

Midday Saturday 30/5/20 - this number rang & my android phone alerted that this was a potential fraud call so I let it go to voicemail. No one left a voice message but it sounded like a call centre in the background.
Yesterday I recieved a text from NAB suspending my account for strange activitiy - what is strange is that I have never ever had an account with NAB. Not sure if this is related to todays call.

Caller: Unknown number

Unknown interstate number so did not answer, let the call ring out, no message left. The number belongs to ' CLEVER CONTACTS' who are a fundraising company.

Caller: Clever Contacts

Rang back recorded msg thanking me for calling 'Clever Contacts'. LOL!

Rang out unknown number.

Unknown number so let it ring out. No message left by caller. Now blocked.