Samsung ****** daylight ******s

I bought a contract phone from last year December from telkom, early this year it started making a rattling sound like something is lose on the inside, so yesterday I got a chance to visit Samsung eastgate branch only yo be told my warranty is canceled because the camera GLASS is cracked ,and I explained to the lady that the camera GLASS broke recently and wasn't the cause of the rattling sound and she was blatantly rude .I had another problem which the phone started after updating the system where my phone either freeze of and the response is very slow and I didn't even get the chance to explain that as well. Never again will I buy this brand because they don't value customers and are *************.