expensive doesn't always mean better

Im very disappointed in this brand ,i bought dubery sunglasses for my boyfriend in January 2022 for his birthday via takealot, its December 2022 and the polarized tint coating whatever its called ia already comming off l, he doesn't use them constantly but on a regular basis but for R600 which is alot for me i honestly thought it will last longer than 12 months. What a disappointment definitely wont recommend