We have reason to suspect that you are our competitor to provide us with malicious bad reviews:we shipped the 10pcs brush to you on 2nd,January 2024,and you received the brush on 8th,January,you replied us in that day"When I received the brush there was no problem, the brush had a problem when I put it in a sulfur solution"(Alibaba has chat records),due to the customer putting the brush into a sulfur solution, the brush was damaged. Improper use resulted in the brush being damaged, which was caused by personal reasons,I have properly given you several solutions, but you don't accept, just want for free get our brush then don't spend a penny,as we know the acrylic brush which is made of 100% Kolinsky hair is very expensive, this is impossible for you don't return our brush to us,finally, Alibaba determined that your refund failed,until March 12th, you maliciously gave us a negative review,it is unfair for us