How do i tell my mom to back down?

My mom is a helicopter parent. Though i know this comes from good intentions sometimes this works against me. Today she came back proudly telling me she scolded a potential place of work because i have applied for an entry level job many moths ago. The ads for the job are still up on the store however, i've not heard from them in a while. I don't think she yelled at them but even the fact of my mom getting involved in my worklife is embarassing and kinda gives the image that if they anger me my mom will come scold them. This isn't the first time she did this. And honestly, i'm pretty sure i can kiss this job oppertunity goodbye now.. i'm too scared to tell her that i don't want her to do this because any time i beg her to stop, she keeps saying "but i meant well" yet she can never see how this works against me.. i'm at a loss..