Not Surprised Vodacom Have Such Terrible Reviews

I've been fighting with Vodacom who, out of the blue, phoned me months after I converted my cell phone account from a monthly contract to prepaid, saying I owe them R390.49 No statement, nothing. When I phoned them (and just trying to find a phone number is a mission) an automated answering service asks for your account number which I typed in on the phone and then it informs you this account does not exist - goodbye. ***? So I emailed them twice and they didn't respond. Next thing I have a collection agency on my back. They offered me a discount to settle. So I phoned them and said what's the discount? They said no, there's no discount. So I asked why they offered me a discount then? They said oh it would normally be 25% so I would owe them R292.50. So I said can I pay you that then? So they said well I can do that but then the R98 shortfall will reflect as outstanding and I would get hassled over that for the rest of time. ***? I ended up just paying the whole thing to be done with it and clear my credit record but I suspect that will be a mission as well.