Vodacom Fibre Account Incorrect

Since the end of March my Vodacom Fibre account seems to be mess. The amount I am paying is more than what is on my invoice and the statement does not match either. When I phoned no one could explain to me what is happening on my statement. I was told it is due to the new router I received. What router???? I have the same one as from day one. I am tired of holding on for hours on end and getting nowhere. The issue is still not sorted and my account is a mess. Who knows what is going on and who can fix my account???