Found this. Company called Aviloo seems to think that fast charging is not good for your battery. But seems not many cars tested.
https://norway.postsen.com/business/109628/Recommend-fast-charging-only-when-really-necessary.html
Same happened to me. Forgot to top-up. Years with same phone number, now gone.
AIS call center told me they can reactivate old sim with old phone number, if it's been dead less than 45 days. If that's the case, you might want to call them.