Not sure about the area you live in, but there is a dental college in Georgia (Augusta). We have referred people there, as the price is much cheaper. We also refer people to the local Atlanta dental hygiene school for cleanings if they cannot pay.
See if there is a local dental college and perhaps they can provide you with some inexpensive care. If you are willing to fly to Colombia with your fingers crossed to have significant dental work done by a dentist you have not met, best of luck.