Yet another bill shock being ignored

We are a company spending quite the amount monthly on all our accounts with Vodacom. They solved our first bill shock query but because it took 3 months to sort it out they made the same mistake again and now after logging the problem with them on the 18th of Feb and they said they would respond in 24 hours, I am still waiting. <br> This is now the 3rd time we received a high account on the same number after a call limit was initiated with the opening of this contract. Can someone please assist us.