Number is a direct line to the debt recovery manager handling account of the person they asked for. They do not usually make the initial contact call and this number is supplied by the account manager to the debtor. The number is supplied for direct contact between both parties. If you were called then the debtor has supplied your number to their account manager.

I returned a call from this number (02) 8199 2321 but no one answered the call

Said personal business matter asked for address but used my nick name - so block them.

Credit corp