Until the telephone providers are also recognised as being complicit....
then this is just a show with the usual effect of the offending company going bust and the usual people they were advertising for excluded. In this case it was self advertising but for too long these guys have just ignored the law and effectively got away with the profit.
The telecos know who these companies are but since they are never held as complict they do nothing.
If you want to stop it once and for all then make the telcos liable for helping to spam their customers or the spammers will just move out of your jurisdiction and thumb their noses