I think we just need to be prepared for these sorts of things. Travel with cash, your debit card, and one or two credit cards. If you can afford it, have a backup SIM (Twilio sells SIM cards for about $3 and the cost to keep them activated is $1/mo, and nothing more if you don't use it [0]). Use a Twilio or Google Voice number that you don't use for anything else for 2FA or account recovery for services that require a phone number (some providers reject these numbers, but many will accept them).

[0] Full disclosure: I work at Twilio and built the first version of the wireless product, so I'm a bit biased.