disgusting service

i have a iphone 6s with Vodacom which is suppose to be a premium of R304.20 per month. I have had endless problems with Vodacom they always charger me whatever excessive amount that they feel like my recent incident with Vodacom is that they charged me a debit order fee due to there negligence. My debit order is for the 27th of every month. however for the month of march Vodacom made my due date for my Vodacom acc on the 30th of march due to the 27th being a Saturday which I understood. so on the 27th of march 2021 I took it apon myself to go into a Vodacom store at the workshop in Durban I explained to a consultant there that I will like to pay my she showed me how to do it instore and advised me that because it was on debit order I must call in the call centre and advise them that this amount is paid I agreed. so because the due date of the invoice was the 30th march which would of been the Tuesday I was going to call in on Monday and notify them, Monday came and when I woke up in the morning they had already debited my acc for the amount now mind you Monday was the 29th of march so I called into the call centre to advise them as to what has taken place I was advised by a consultant that the money is not reflecting as yet and it will take 3 working days to reflect on vodacoms system so I asked what will be the process for me to receive my funds back I was advised that once the money reflects after 3 days they will log a refund and it will take 7 to 14 working days for me to receive my money back. So me being an experienced worker coming from a customer service dep I knew that the next invoice will be issued out and the credit balance will go off via the next invoice so what I did I reversed my money the next bill was issued out and I noticed that the bill was R100.88 more than usual but the app is not showing me what that amount is for so I called in again on the 9th of april 2021 and I spoke to a consultant whom was sarcastic and gave me a lot of attitude and advised me that I will be liable for that debit order fee as im not suppose to pay the account manually I requested for the manager she went for 15 mins to get the manager then comes back on the call and says the manager is not available I must leave my details for a call back there famous words which you never get that call. I advised the agent that I will wait for the manager to be available she then put me on hold for 1hr and I sat on that call waiting for the manager to come to the line eventually a male by the name of Cedric Mphola comes on the line he begins to also advise me that I am liable and I shouldn't of paid the account manually yet they can both see that my history with Vodacom I have never missed a payment not even once i was livered with the type of service i received from them i just cant wait for my contract to end so that my continuous nightmare can end