Bad service

I use to be a big Vodacom fan up to this year. When someone talk about other cellular companies I always told them that there is no better company, because Vodacom is simply the best. But now I changed my mind. Vodacom is the worst company that you can think of. I can not wait for my contract to expire so that I can get rid of them. I changed my banking details from one bank to another. The one contract they deducted but the other one they do not deduct. I called them several times but they still did not fixed it. I tried to change my address but if I call them they still did not charged it. Iask them for there banking details so that I can pay the money that is in arrears. The person's that I spoke to told me that they will send me a sms and a email. It never happens. Every time they suspend your service and you have to pay to reconnect your service. If you want to know when your contract expires you get different date's. When I complain about it then told me that someone will call me that same day but it never happens.