Get an email address that you own, on a domain you control. Switch to a provider that takes your money for whom you are the customer - not the product.
I did this with Fastmail and Iki.fi, a Finnish non-profit[1], who have been selling people "permanent" email addresses since 1995.
There is a different danger however — after about 8 years the annual fee went from about $15 to $60.
That is exactly the point krageon is making. If you have a .so domain (or .earth like me), you need to have a backup at least, so you can still access things like a normal human. My @gmail.com address have been used for this, but seems I'm gonna have to get yet another domain with a normal tld so I can stop using the gmail one for when .earth is not correctly accepted.