Telkom.. our word means nothing

Ifind myself thinking how infutile this effort is in making Telkom realise their mistake since there are so many complaints about them and they just don't seem to care. I had a month to month agreement for wifi. Due to an very enticing offer for a free modem, range extender and a TV box on a 10 mbps line, I decided to enter into a 24 month contract with them. The agent gave me the modem immediately and told me to allow 72 hours for the necessary approvals to go through and then come back for the remainder of the items. I told him I can send my son on the following weekend which he agreed as long as I sent a note along. When my son arrived he was advised that we do not qualify for the free products but the line has been upgraded. I went in personally to take this up and the attitude was the same that as an existing customer I did not qualify. Why then did I get a router? if this is the case I have been duped into going into a 24 month contract and I want this reversed. I am now told that I will be penalised if I cancel the contract. This is in breach of an agreement I had with you and since you cannot fulfil your part of the contract, it becomes null and void. I will not leave this an intend to get a fair deal one way or another.