Bad service day light *******

I just finish R100 of my airtime speaking to *********** people at Dstv. I called on the 9th and someone spoke to me advised me and now I am billed for some thi g else and all of a sudden they cannot find the call. And now want to force me to pay a bill of over 1thousand for their mistake day light *******. They guy that spoke to me tells me go back to your terms and condition yet they are the ones that ****