Vodacom bad service

I want to lay a complain with Vodacom I arranged for a debit change to the 7th of each month they kept debiting on a wrong day it’s either on the previous date the 25th or when I don’t have money .i was advised to do a reversal which I did ,it started affecting my account they added interests .again I called last month also to debit on the 25th coz they just messing with my credit I got an sms that my account is in areas I called them again they apologies and ran through the debit .this month again the same problem I called and I spoke to Simphiwe Ntsute he apologies and called credit department and they said they will remove the interests on my account and debit the next day since they had a wrong debit order date meaning the other consultants didn’t do their job .i requested to speak to someone senior he told me team leaders are on a meeting and they will call me back .no one came back to me ever since .they messing with my credit my debit orders were running so well the problem started when I changed the debit order dates .when I ask that I want to speak to the consultants who made a mess to take accountability I’m being told they don’t know them meaning that Vodacom let anyone enter our profiles unauthorised and do as they pleased .i want to cancel a relationship with Vodacom I will go to other providers .they must come take their box of router their service is very poor .after I was promised that the debit order will run through yesterday money is still sitting in my account .They don’t value customers ,I take my time all the time to call them and they do what they suppose to do .i am very disappointed