DESPERATE VODACOM CUSTOMER: Account suspended - I am a prepaid user. No help forthcoming from Vodacom.

I am a prepaid Vodacom user. Currently I am in Namibia for an extended period. Before leaving SA, I successfully put Roaming on as well as the Opt In function for International calling for prepaid customers (this latter function is not vital for me). Initially all went well and I could successfully send and receive sms messages. Since 08 November, I am not receiving any sms messages (I can however still send messages). It is vital for me to receive incoming text messages (from my bank and for work purposes). When I try to call any of the Vodacom numbers (supp**** by them for help - including when outside SA), I merely get a voice message saying 'This account is suspended. Call Vodacom for help". I cannot make that call!! I have more than enough money/airtime on my cell and everything on it works except for incoming sms messages - the function I need most. The problem must lie with Vodacom. HOW CAN A PREPAID USER'S ACCOUNT BE SUSPENDED?? I have LOTS of airtime/money on my cell. I have tried to contact Vodacom online but there simply is NO email through which I can do so. I have sent a message to Vodacom via Messenger on the Facebook page. Still no help. WHAT CAN I DO TO RESOLVE THIS ISSUE?? I REALLY NEED VODACOM TO LOOK INTO IT. The problem lies with them and they must ensure that it is fixed.