Device Insurance I did not request

I saw that I have a fee for device Insurance that I did not take out with DSTV. I called the Multichoice contact center and was Given the insurance number to call as they cannot assist. I tried to call this insurance number and the line is engaged. I want Multichoice to please send me the contract that I signed with them taking out device insurance or the call record of me agreeing to take the insurance. I have been ignoring their sales calls for months on end only for me to get Insurance added onto my account without my knowledge. If this is not resolved according to my satisfaction, I will definitely take this up with the ombudsman.