ARREARS - BUT NO ARREARS POSSIBLE

My account with Vodacom goes per debit order every month from my account, but this month, due to the paydate falling on a public holiday, the money was not transferred apparently. On Saturday, I received a sms stating that I was in arrears. I went to the bank and they showed me that the request is lying on the system waiting to go through. Yesterday again I received a sms stating the arrears treatening to discontinue my service if not paid. I called the bank again on my expense and they assured me that the problem is on Vodacom's side. They requested, in fact, the payment twice on 30 April 2015. What if I make the payment now and they deduct it twice from my account?! After phoning them we were now told to ignore all sms's - the mistake is on their side. They will now retrack the request for payment and send it through again! In the mean while they let us look like fools who do not want to pay their account! An apology would be appreciated after they have cleared up this mess!