I found problems accessing ATMs at some banks with my Visa card - even tho the ATM showed the Visa symbol. It would pay to try different banks. I agree that the big problem with ATMs is the high bank charges. I prefer to take plenty of cash and change small numbers of high denomination notes at different money changers. So far I have never been ripped off - I keep it simple by exchanging say 3 x $100 notes so that I can easily calculate how much currency I will get.
For security (and good manners) I put my notes on the counter spread out so that it is clear how many notes I am changing. I do not touch my notes again. The money changer will count out the currency and I do not touch it until he is finished. I then move the currency to my side and count it one note at a time. The money changer must not touch the money again. If he does - which has never happened - I would recount it in front of him. I concentrate, no chatter and everybody keeps their hands off the cash! The money then goes in my front pocket and as soon as possible I split it up into other pockets and my bag.
10

stings
Pro tip