CELL C POOR CUSTOMER SERVICE

I am absolutely fed up. I have a samsung z flip which has an issue on the screen and I need to take it to Samsung for repairs as it has a warranty. I have called cell c numerous times to request to4 copy of my contract or invoice which needs to have the IME number displayed on it. To date, and after many calls to request the same I received documents without the IME number. Upon calling back I specified that I was sent the docs without the IME and I need for it to appear on the docs. The agent assured me that they can see it reflecting. Yet again received the document without the IME (this was like on 3 occasions mind you) so now I am paying for a phone that's not even working because cell c cannot provide me with a simple document so that I am able to get my phone fixed.