This may not be a language issue at all. I understand because it is Puerto Rico that would be a presumption but I expected the reply you posted to be written in broken English and answering you incorrectly. This may just be one of the many people, everywhere these days, who simply do not read entire messages. Your replies are excellent but very wordy to the current climate. People now abbreviate even when they are speaking, "LOL that was funny", "OMG I didn't know that", "GTK thanks" (that's good to know).... so I'm thinking they didn't really "read" your entire lengthy second reply and that's why they responded what they did. Maybe try again with a shorter reply, or if you already did and didn't post that then I am incorrect.
I prefer the advice from tunicaslot- you've tried your best but I would just cancel now and refund. The mail system is still recovering from the Hurricane. The damages done will be there for several years to come. The infrastructure for that island is minimal at best so you may run into the same issue the second time.
