Well I get weekly texts saying I have subscribed to some or other thing or I can opt out by replying "NO" or "STOP" which I then do immediately and I never click on any links these dodgey companies send me. So I hope I never have to 'understand' as I take care not to get caught out, sorry wasn't aware of your hospital stay, just found your OP strange that you say you locked away your phone and sim.
Good luck in another country.