Poor service!

From the start they did not disclose there is a installation fee of R1600. Once I got my first invoice I noted the installation fee. I phoned to query it and they said I have to change the first page of my contact to a 12month contract to not pay the installation fee. I did so and submitted it. Now I see I was billed the installation fee and getting no response from them. Really wish I couldvturn time around and go with vox