No Service for 9 Days

Vodacom, with no reason, as far as I know, and that they can tell me, terminated my service on the 1st December. My account is up to date, they debit my account. I have tried on 6 occasions(different days) to utilize their call back facility, but I get a sms telling me that I already have an open call session and that someone will phone me back within 24 hrs - this has not happened, I cannot phone out, even to their 111 number.