Reply To: Serious Issue in the (ADD TO CART)

ok i think this is happened because of the (Wocommerce currency switcher)
so i have disabled that plugin ,
but i need your support please
1- what is the best currency switcher compatible with the theme ????
2- how i can add the switcher in all the pages ??
3- anyway to change the currency according to the country of the user ????

please reply ASAP