In each of your e-mail, is a link for you to click, to see your e-mail from a web site / web browser, instead of your e-mail program. You can log in to your AmEx internet banking, then go to online chat, give them the link, and say that your loved one is stuck in UK / Italy, and can't get out, and this e-mail is not nice at all.Never had a response to any email from anyone at Amex, ever -- but I like your style.
I have done the exact same thing, with the previous AmEx mass e-mail stuff up, when they addressed customers as Dear 123456789012345, are you missing out on points? Went on chat, told the operator that, yes I understand I am just a number to AmEx, but please don't make it so obvious, and they re-sent apology later.
The most drastic one was from a gift company, which sent me an e-mail: 'Hi Chicken, do you know, today last year, was when you sent this gift [insert photo of the gift] to Hot Chick? If you have not given a gift for a while, maybe it is time you send one!'. I replied back, saying Hot Chick was my ex, we broke up already, I am upset, but not too depressed as yet, but imagine if someone else was depressed and were to jump off Sydney Harbour Bridge (yes, I really did say this). They replied back in under 24 hours, fully apologised, and said they would be more careful, and would not contact me again.
Instead of being assertive, you would be surprise how much responsive if you could play a drama queen appropriately.