VODACOM WIFI IS A ****

We recently had a contract taken for wifi with vodacom. We must say that we have never seen such bad service .Firstly you took weeks to install the thing and weeks to get me connected, I was promised the first month free which never happened. The initial agreement was for me to pay R489 on a monthly basis now the bill is over R500 which I don't understand. We have paid all those monies ,I DONT HAVE INTERNET. The connection comes and goes as it likes. Can we have the account adjusted and be refunded all that is due.Connect the internet that we have paid for TODAY!!