Rude not willing to work

So I went to Samsung about 2wks ago. Lady says she will order the screen my must come bk with proof of purchaseI couldn't find that so I came with the box.when I get there the Indian lady leaves us there's a queue of 5ppl. She's gone for 20min than we ask around MTN where she is than this guy comes out so I'm guessing there were having a good sleep while we wait. He comes doesn't greet says oh we have to order your screen even though I've shown him the order invoice. Than after I explain to jim that this is a replacement phone from the insurance says he wants proof of purchase like really maybe where he comes from you get POP even tou you did not buy to top it all he calls the next customer while I'm speaking to him . When I question him of his rudeness he holds my hand. I've never been so irritated in my life I just walked out the store. Maybe the policy with ADH and Samsung is to hold customers hands while it's not professional at all. Really disappointed as I've had friends whom got there phones fixed by ADH with no hustle, if there can get the proof of purchase 4me I'd be really happy.