No help from anyone

I do not have enough space here to say everything that needs to be said regarding the poor service. I purchased 3 Dstv devises from someone. When we started the buying process he spoke to a dstv call centre agent and was told that a signed copy of him ID book would be sufficient with the change of ownership papers. Now that i have paid my money to this man and submitted all the documents to the relevant department they will not proceed with the Change of Ownership. I have sent numerous emails to them to try to resolve this matter but no one is getting back to me. I have spent money and have these items in my possession but i cant use them!!! All the documents are there, surely you can just phone the guy i purchased from and confirm that you can proceed with the Change of Ownership... I need to have this matter resolved.