No Assitance - Proof of Purchase.

I want a proof of purchase. I went to branch that I took out my contract with Telkom Adderly street Cape Town. I was advise that they unable to provide me with one, because they don't have it. They can't even write me a letter to confirm the purchase. The call centre was contact (16 April 2016, time: 11:00) on my behalf, I spoke to Eugene who promise me that i will my confirmation within 24 working hours. Today I call the Call Centre to do a follow up on my request, since 24hrs has past. Spoke to Sifiso and Noma (Team Leader) from the call centre who advise me they cant not help me with my request. Reason I want proof of purchase in order to take the device for repairs. I have been sent to pillar to post that I must to the store. My warranty is finishing on the 23rd of April with this run arround.