Travel Saver rates do not apply

Hello. I’m somewhere over Iran. And I’ve just got this message on my cellphone:

Network On Air (Aerospace) is a satellite. Travel Saver rates do not apply. We encourage you to make calls at R23/min for int’l calls rather than receive calls at R150/min, R2.75/SMS & R128.00/MB for data. For T&Cs and rates visit www.vodacom.co.za/roam

I’ve already checked that my mobile data is switched off, but if you could all avoid calling me for the foreseeable future, that would be just great. Thanks.