Useless Vodacom

I am on a 600 minutes package deal with Vodacom. I have had 1200 minutes beginning of August on my Vodacom account. 600 minutes carried over from July. I only used just over 600 in Aug and just under 600 should have been carried over to September. Now I only have 600 for September and none were a carried over. Log a call - they phone you - say they will call again but then you only receive an SMS that says absolute nothing - and you cannot reply to that. Then you phone in again - hold on for 30 minutes - problem still not solved. Eish - do not do business with these people - I have 8 numbers with them but the moment it runs out - I am gone with them.