Talkabout MJ270R

Hi Everyone. I bought two radios in Per?. Talkabout MJ270R and now I live in Argentina, but since I came the two radios doesnt work anymore here, both of them just scan 14 frecuencies and the can’t talk eachother, even the emercy call. I can’t undestand what happend because they been working just fine.
Does anybody have an Idea what happend?