Vodacom installed screen protector poorly

I had such a rude experience when I visited Vodacom 4U (near entrance to Woodlands Boulevard) earlier this morning to have a new screen protector installed on my phone. Saleslady was extremely arrogant when she had finished installing protector for me, as I questioned the warping and bubbles underneath near earphone. She rudely told me bubbles and warping will settle in about twenty four hours and added that I can ask anyone else their opinion on the way she installed, she is a professional, she knows her job, etc etc. and when I went to ask a man near entrance to store, I could hear she was busy talking to her colleagues in her own language about me. Although I could not understand everything, I know she was talking about me and with me being so petty. Then, once I got home, I noticed the screen protector was not "professionally" installed, as sticker is covering lower left of the front camera. I really wonder if Vodacom will honor their agreement, as they mentioned to me that I can have screen protector replaced if I am not entirely satisfied with it after twenty four hours. So, I do want screen protection done again, as it is really not well installed with the warping near earphone and how it is partially covering my front facing camera. Yet I am not too keen to visit this branch of Vodacom again, especially with such a rude sales lady thinking she knows better than me.