International parcel shipping services

I'm panicking cause I'm moving back home after two years with a lot of stuff, and the option I was given by JP Post months ago to send my additional suitcases isn't allowed in the end.

I need an international shipping company that lets me send standard size flight checked baggage. It needs to be sent to South America.

JP Post suddenly gave me tighter measurements (packages of half the size of a suitcase) and for double the price each. I after inquired at Yamato, and they allowed the size of a regular suitcase, but expected me to list every item with its description, price and even an invoice of its purchase (impossible, since it's all used stuff from years).

It's only clothing what I'm trying to send this way, does anyone know how can I do this? Please help, now I'm running out of time 😢🙏

by meleeisland1211