Disgustingly rude

I am absolutely disgusted with the service I revived today (26th December 2018) at cell safety pty. I went to this shop because no other phone shop was opened. I went looking for a phone cover and tempered glass. As a customer I expect to be treated with respect. The guy who helped me was disgustingly rude. I asked him to please put a tempered glass on my phone. He did it no problem but I found a crack in it so I asked him to redo it. So he did but then there was an air bubble and as a paying customer I refused to pay because the air bubble just gets bigger and the glass then falls off. I then asked him to do it again and he told me “go somewhere else and get it done because I’m not going to do it for you” but still wanted to charge me for the glass. I was absolutely disgusted!!