I constantly get text updates from Vodafone saying I don't have enough credit to send a message even though I'm on a plan with unlimited texts and can send texts. I receive them everyday at random and it's super annoying! I've called Vodafone and have switched off my iMessage and Facetime apps, the customer rep said he even switched off alerts on his end. So what else can I do? I can't seem to block the Vodafone number.