Lost Ownership of Domain, but I use that domain in an old company email

I screwed up as I took another job & I was not paying attention to an old company email that I own and was an irregular on checking my personal email that I’ve had for years. The auto renew did not go through because I lost that credit card and I had a new number on it.

Email does not come in anymore on that business Gmail account . I can however send on it.

Here is my question, as long as I pay Gmail will I be able to send on that email or will the owner of that domain eventually be able to shut me down? I am working on the assumption the new owner won’t let me buy it back. It really isn’t worth any more than 500 bucks or so to me as I can store all those emails in there and people that really wanna talk to me have my number.

If anybody else has any ideas I’d love to hear them. My plan is to send an email out to everybody on that account listing my new work & personal email can use a domain to send and have the reply to my personal account that works as well.

Thanks