ACCOUNT PROBLEM -NOT MY OWING AMOUNT - NO CONTACT - HIGHLY UPSET

I was hoping I could rate 0 stars... I am HIGHLY upset with Vodacom, I pay my accounts via a debit order all the time and last month (May) all of a sudden I receive an sms stating that I owe them R305 to which I go to the Vodacom store in the Brits Mall and sort this problem out which was sorted out. This morning 16/06/2022 I receive an sms stating I owe them R4 087.79 - this cannot be possible as the bill I have with them every month is R160.75 - AGAIN I leave4 my work place to go and sort this out and find out what is happening and how this is possible as I have a VISA appointment as well and now because of this amount I supposedly owe I cannot go for my VISA Appointment because they will deny me ... At the Vodacom store they checked my account and my statement and account DOES NOT show ANY outstanding amounts except for the R160.75 for the end of June - this makes sense. They then tried to call the Vodacom customer service who is not working due to a public holiday, but never mind we are available 24/7 as they always say they are always available until you need to call them and you receive and automated message. The amount that I supposedly owe is NOT MY ACCOUNT - it is a mistake on THEIR side which I now have to sort out but cannot because *** is not available today. How am I supposed to sort a problem out if I cannot contact them on days that I have a problem and now my account has been handed over to VVM for collection but IT IS NOT EVEN ON MY ACCOUNT AT VODACOM ON THE SYSTEMS!!!!! I have to call and ask them to update my status and then HOPEFULLY I can get everything done before my VISA Appointment, again how do you sort something out if you cannot even contact them??? I hope that someone from a higher rank at Vodacom sees my review and contacts me ASAP and they sort out this problem because now thanks to the wonderful Vodacom I cannot go for my Visa appointment and now I have to move everything and hopefully see my Husband in December - THANK VODACOM FOR JUST MESSING UP ALL MY PLANNING AND MY ONLY CHANCE TO SEE MY HUSBAND DUE TO YOUR OWN MISTAKES