Caller: Mortal Ampol ??? A Sydney number

They left a message saying they were from (sounded like) Mortal Ampol (?) left another number to phone back on - 132101 extension #2 saying it was about an overdue account that will go to Creditors for 5 years against my name + that they’ve sent emails about it. Any suggestions about such a company. The man had possibly an Indian accent and said the company name rather fast and mumbled it almost. Thanks