Vodacom refund

My boss mistakenly made a payment to Vodacom account sum of R50000, I have called Vodacom spoke to Khensani Sithole who escalated the matter to Cebile Dlamini , I have send all the documents requested, Cebile said she will give instruction to Khensani to do manual refund. They promise that they will refund us within a week. To my surprise we still going back and forth via emails with them still no refund. So, I failed to understand why Vodacom is taking so long to refund us after so many weeks, we are disappointed with Vodacom since they saw that money comes from business account and it intended for our clients now we are fighting with our clients because we need to make payments with the very same money