Recently purchased and activated a new Kogan Mobile SIM on their EXTRA LARGE plan. I never disclosed the number and only made phone calls between family members. Now I keep receiving spam text msgs on this number, from Dominoes pizza to cruise ship offers, to bank scams.
Does this happen to other Kogan users? I am sure I didn't tick any boxes to accept promotions.
Just a suggestion, but perhaps one or more of your family member's phones have malware installed, and the spammers are getting it from them? (unbeknown to them of course).