I contacted their support team, and they acted as though they have no idea what I'm talking about.
I tracked down an SMS Australian internet marketing firm called "Burst SMS" / "Transmit SMS" / "BurstSMS" / "TransmitSMS"
They are sending illegal Opt-out SMS message from 4115
Para Rubber: Full Range of Steel Wall and Deep End Pools now available for Summer, while stocks last! TapTh.is/*******. Interest FREE over 12 months
opt-out STOP
First Skinny's support page "submit" button wouldn't work from either Chrome / Internet Explorer
Then I went onto Skinny website, only to get stuck into a chatbot ad-nasuem, until I said "talk to human"
Then I got a human, who first said "they look into it" which I then followed up how she was going to follow up.
After a very long pause, she said she'd talk to support.
Support then suggested it was a "Flubot courier scam".
Since the website from the SMS goes to an Internet Marketing firm for Pararubber, it's clearly not courier company scam.
Extremely frustrating.
I did report the SMS message to the DIA spam report number,7726