I called back number (02) 8027 2781 reached voice mail but did not say from what company.

called back, the man with Indian accent said this is in regard to a personal banking matter; not a sales call. However, the phone number they rang is not associated with any bank or financial liability. The phone number they rang is a spare phone that is only used in emergencies for internet connection when my wifi is down.

Caller: Its citibank

Called back and had to ask 3 times before they identified themselves

Called 3 times today but no message. Added to reject list

rang twice since but didn't leave a message & I on't call back if that's the case.