vodacom cant do what they offer

<p>We have a few contracts with Vodacom and in the more than 10 years we haven't recieved an Invoice from them. If you complain you get. beginning of this year we recieved a phone call from them to offer us insurance on the screen of our Samsungs at a reasonable price. We accepted and was told it would be done on all the phones. When we recieved our invoice for the first time this year we saw there was insurance only on one phone. Phoned them this weekend and they said we can not get insurance through them. How does that work. so far every month there is a problem with our account. when we phone to enquire the call center does not understand us. </p>