I'm after some advice. A few years ago my line manager and I had to travel somewhere for a meeting. She gave me her phone number and I made the mistake of texting her from my own phone when I was on my way to meet her. I wouldn't class her as a friend, we are most definitely colleagues.
Since then she occasionally sends me work related messages on WhatsApp, and has since shared my phone number without permission to another manager, who has phoned me at home about a work related incident.
Am I being unreasonable to not want to use my own phone for work communications? I don't particularly like my job, and don't want to be reminded of work by seeing their profile pictures whilst scrolling through WhatsApp (I saved their phone numbers so that I know when they are calling before I answer).
I have a work laptop, and they can contact me on that by email or Skype/Zoom, but as soon as the laptop is off I want to be left alone.
How do I fix this? I don't feel like I can tell them to delete my phone number as it's been going on for so long, and don't really want to change my number because of the hassle involved. Any ideas?