Axel, we have exactly the same problem now in New Zealand.
It's because it's going through a Call Centre, country unknown where they are based and routed through.
I had 2 entirely different businesses with a txt using the same number, one was Airbnb the other wasn't.
It's annoying and very unprofessional.
One has to question if " Privacy law / Data Regulations" that are in place internationally are been breached.
Just what "data" of ours do these "Call centres / Telecommunications centres have of ours?
There are people who have Protection and Restraining Orders in place and others who have confidential and unlisted phone numbers who must be terrified by this means of communications from unknown people with random numbers showing up.