How do you deal with a mum that tells everyone your business?

Im 25 years old and i recently became a engineer in the railway. I tried hiding it because i dont want anyone to know but it is impossible because i need to wash my corporate clothing and it has the company logo on it.

My mum saw it and then went and told everyone about it in her family. She also keeps banging on about my money and how much il make and stuff like that. She had my sister search up my pay on Google by searching the company. (The pay isn't true on Google anyway).

She tries to spy on everything i do and starts telling people about it. I work at a football club too and she searches up the days there is a match and when i won't be at home so she can bring people over who i dont like.