IMPOSSIBLE TO GET PROOF OF PURCHASE

I have been trying for 2 weeks to get a clear copy of my proof of purchase for my Samsung phone purchased on line through Telkomobile February 2015 in order to get my screen fixed under the warranty. Eventually after 6 lengthy calls someone did assist me but the copy is blurred and it will not be accepted by Samsung. I have called the sales department twice more, gone to a branch, asked for another copy but each time the result is the same. Surely the head office must have a clear copy on file. All I need is a legible copy. Please assist