This is not a service I personally use, but I’ve thought about it: services like mysudo let you select and create new phone numbers. anonyome.com/individuals/mysudo-plans/

In your situation I might research and select a service like this. Then create a few disposable numbers. Give one to your trusted friends and family, another to employers and banks, etc, and the third to anyone else you need to contact.

Once you’ve transitioned everything important to the new numbers, get yourself a new phone number, and don’t give it to anyone. Maybe just your parents, for emergencies.

This has 2 downsides and 2 big advantages I can see.

Cons:

1, it cost you monthly. I think 3 numbers from mysudo is little $5 a month 2, it’s a pain to transition folks to your new number.

Pros:

1, if your stalker finds one of your new numbers, it’s easier to change the. 2, you can narrow down who it might be. Like, if you have a number dedicated to work contacts and the stalker starts texting it, you know they either are a coworker or got it from a coworker.

I think Google voice can also give you some free numbers, so look into that. Good luck!