Urban Company — fully untrained girl who send by a company

I have booked a girl for waxing. she is fully untrained girl who send by a company. I told her very clearly that please do it carefully because my skin is sensitive she said no issue i am experienced mam but after the waxing my whole skin got rashed, infected my whole arms. Worst service by urban clap company. I need my money back and proper treatment of my arms because whole texture has been changed of my arms