[Turning off free shipping without relisting]

Is there a way to turn off international free shipping without having to relist my inventory? I’ve had two New Zealand orders over $250 (the threshold for intl free shipping I set 10 years ago) and each one cost about $95 to send.  I want to remove the free intl shipping from my inventory, but I don’t want to relist everything because I’ve been using the discount every month feature and I don’t want it to reset back to guide prices.  Any help would be appreciated as I cannot continue to take a beating on the shipping that has gone up 50% or more in the last few years.

[Tracking required on International Orders March 26, 2021]

For reference, this is the tracking number: UA104937824US

[Tracking required on International Orders March 26, 2021]

I just had an order to India.  Tracking is not provided by India Postal Services.  What type of tracking number should I obtain if one is not available?  If you are suggesting that we need to use a trackable service to certain countries, I will just cease sending anything international any more because the cost to ship the comics to India was $45 through the USPS and India mail.  With a trackable service such as UPS or FedEx, the cost would be $153 (UPS) or $165 (FedEx).

While there is a tracking number to show where the package is in the USPS system, once outside that system, the tracking no longer shows any information.