Hi - welcome to the forums. We had a new member from Saudi Arabia last year, I think, who got a chameleon and was told by the pet store to force feed him tablets. When she realized this was totally wrong and her chameleon became very sick, she tried desperately to find him food and supplies. If I remember correctly, she was not able to locate crickets or roaches for sale, and tried to catch wild bugs. Unfortunately, her chameleon did die.
Can you get any live bugs at all? Superworms (morio), mealworms, any type of live bugs at all? Even if you can get a small amount, you can start a breeder colony and hopefully establish your own food supply. You can gut load your own crickets with fruits and vegetable scraps.
I doubt you will be able to purchase live insects overseas and bring them home with you. Customs will likely not allow that.
Keep catching flies and moths - it's better than nothing. Moths you might be able to catch more at night. Hold the moth close enough that he can grab it directly. If his tongue is having troubles, it is likely due to poor nutrition before you got him or being dehydrated.
How do you water him? Chameleons like moving water - not still water. Do you mist him or let water drip?
Here are a few general resources for you:
https://www.chameleonforums.com/care/chameleons/
Let us know if we can help you, but getting live bugs is the most important thing right now. Is there an animal vet that might be able to help? Do you have a fishing supply store that sells live bait like worms?