Not charged pro rata for new device

I took out a new contract on 18 November. I was told I will be pro rata billed for the remainder of the month and that was fine. When I received my invoice however I was only pro rata billed for the data and call package and not for the device. I was billed the entire amount for the device from 1 November even though I did not have the device until 18 November. I was not informed of this and I am not willing to pay the entire month for something I did not have. I do not think this makes business sense and do not understand how Telkom would think customers will be happy with this. If I was told this is the case I would have delayed the contract and would have gone to take it out at the beginning of the new month.<br> <br>