I received an SMS from this mobile number indicating it was from Linkt, saying I owed money for December etc. etc. As no-one here had yet registered this as a scam I went on to Linkt website and whilst they had a lot of examples of scams and had a "report a scam" form, the form was useless as it wouldn't take my 'attached file' due to the typical .pdf or Word doc, etc. issues. It also didn't indicate what type of file would have been accepted!
All I can say is that this was definitely a scam. I have received similar wording of what it said this time.
End result: The Linkt website is not user friendly as it doesn't indicate what type of "file" CAN be uploaded and there was no email address that I could directly use to send it via an email to them.
This means I haven't been able to report it to them, so this will have to do for others who have received a similar message.
Hope this helps someone!

Linkt scammer notifying of an “overdue payment” in December

Caller: Linkt

Never been outside of NT. No toll roads in NT. Not registered with any toll free accounts. Went on the website. Totally useless and very unfriendly. Unable to access contact numbers. REGARD AS SCAM.

Linkt scammer