Not happy about service

Within the last month my account has been suspended 3 times causing a problem to me seeing that it's my wifes phone and the account on my name and it happens on weekends when I am not at home leaving my wife without a phone. Every time I phone I get told that it is locked and they fix it. At the end of January Vodacom didn't deduct anything from my account. I phoned them and they told me that I am a cash paying customer. After explaining that I've had the debit order since I started the with the 1st contract (about 10-12 years ago) they said that they will fix it only to see that when they deducted the money on the 8th they took R100 to much. When I phoned them I was told that they will come back to me within 2 days, it now is 20 days and I'm still waiting. This weekend my service was suspended again, after phoning them last night I was told that service will presume within about 1 hour. I phoned them again this morning because its still not working. I was told by accounts that I am arear in my payments and this while my account is on a debit order. Up to now my wife is still without a phone and I'm now getting upset for having to pay service that I don't get