Vodacom - Poor customer service

I needed to make an enquiry on my Vodacom account. Phoned the call centre and was on the line waiting for a consultant. After half an hour my call was answered but the person informed me the system was offline. I phoned again later and waited again half an hour for my call to be answered. The consultant asked me the security questions and put me on hold to get my Vodacom profile on the system. After about 20 minutes on hold, the consultant opened the line and immediately put me on hold again. I waited for a while and hang up still with my query not solved. I do not have a problem waiting for my call to be answered, but my query is still not solved. And what makes me unhappy is that this is not the first time...