I went through ATM shennanigans recently, trying to get money to pay 4 months rent in advance. Had a 500 limit at all banelco machines, but could take out my UK daily limit at any machine that let me choose VISA as the network to withdraw from. Some cashmachines let you choose your network. There's a banco ciudad near me that I can take out 1500 a day from if I choose VISA. Depends on the type of card you have I think. Failing all this you can buy USD with a credit or debit card from banco piano and pay the dollar price for any large transactions - its a way of getting around the cash machine limit.
Best of luckjp
Best of luckjp