Billing

So I have this issue with Vodacom I asked them to change my debit order date to the 2nd of every month when I changed jobs there wasn't said to me they don't have that date instead they just went and did it for the 1st day before I pay which means on that day there will be no money in my account ever but for the past 2months it went off on the 2nd and on the first one Friday because I got paid on the first because the 2nd was a Saturday I'm thinking everything fine until November my debit order doesn't go through to find out it is set on the first so how is this my fault and my responsibility when Vodacom employs *********** people and then to top it of R.Maart is not to my responding anymore and he suppose to help me but he clearly just like the call centre *********** and meaning in December my debit order will bounce again on the first that why I say Vodacom is the worst all they want is to ***** and make extra money from people someone needs to do something I'm on the point of going to ikasa.