I can't complain about BanReservas...... probably the one and only bank i set foot in, in this country ( to buy impuestos for whatever government related thing i need to do ).
The trick is to not use BanReservas in big towns. Typically if i need an impuesto i'll buy somewhere in the countryside, and then go say to the government office in santiago or SD.
Easy peasy, in and out in 5 to 10mn max.
As i always say, you have to be half crazy to.want anything to do with a commercial bank in this country.......save yourself the aggro and send yourself cash from abroad, use foreign credit/debit cards, prepaid cards, etc.........