I'm in exactly the same boat. Eventually I opened one if his phone bills which had his phone number (UK). I rang him and tried to explain the situation which quickly turned surreal.
He argued that I was lying about getting his phone number from his phone bills because he doesn't get his phone bill emailed out to him. I said yes, that is correct. Your phone bill is emailed to me. Eventually I got frustrated with him and told him I was trying do him a favour and he accused me of hacking his email account.
Then over the next few hours he called me back multiple times to tell me he had called the police, how much trouble I was in, and to tell me to stop calling him and harassing him or he would press charges. I pointed out he was the one that kept calling me, and somehow that registered and he never called back.
He did fix his phone account so I don't get those, but I get plenty of other email for him.
He argued that I was lying about getting his phone number from his phone bills because he doesn't get his phone bill emailed out to him. I said yes, that is correct. Your phone bill is emailed to me. Eventually I got frustrated with him and told him I was trying do him a favour and he accused me of hacking his email account.
Then over the next few hours he called me back multiple times to tell me he had called the police, how much trouble I was in, and to tell me to stop calling him and harassing him or he would press charges. I pointed out he was the one that kept calling me, and somehow that registered and he never called back.
He did fix his phone account so I don't get those, but I get plenty of other email for him.