Verbally Lied to me

I went with my wife to have my stock and worn out seat bolster assessed. The guy from the shop, KEN, told me that they can fix it and that I "wouldn't even notice that they made the repair once completed." Well, I do notice it a lot because my bolsters have now shrunk by 1 cm and they wouldn't do anything about it. They told me that I would have to pay again for them to even consider attending to my satisfaction. The owner of the shop has quoted that customer satisfaction is their guarantee. The way Ken spoke to me was very rude, sarcastic, and he kept passing on the blame on me that were completely untrue. I will file a complaint on Consumer Protection BC if this doesn't get resolve. Yes, it's this serious and they have had many unhappy customers based on their reviews.