Yes, I've done that before when someone uses my email address. Manage to take over his Facebook and Instagram. But for banking definitely cannot, need to verify mobile number.
That idiot even uses my email to register Apple ID, but luckily Apple quite strict otherwise I would have reset and locked his iPhone.

Call Astro using the info in the bill, request to subscribe the most expensive package or request termination.

haha great idea. i will try this.

Hahaha, I end up calling Apple to disassociate my email with the Apple ID. Took them less than a day to remove my email.

I also got someone in UK using my email (Vodafone  & shopping receipts) .
Has been going on for many years.
I just mark them as JUNK.