I need proof of purchase from Telkom!!!

I upgraded my cellphone contract with Telkom last year June. The phone is now faulty and the speaker is not working. I took the phone for repairs at Telkom store at centurion mall and I was told they can’t help me as they need a proof of purchase.They told me I must call 081180. I called this number as I was told I must call 10213 to get a copy of the proof of purchase or delivery note. I called 10213 with no success none of the agents can help me as they say they don’t have any documentation on their side, they can only send the recording. My phone is not working and it looks like I won’t get the assistance I need from Telkom but every month they are deducting money from my account. A real inconvenience as I have to use my phone for work purposes!