I used another Mail to set up my new Mac and I forgot my account information

Elbaca wrote:

I do not have Apple stores in argentina i bought it in hawaii

How to remove Activation Lock - Apple Support

Activation Lock for iPhone and iPad - Apple Support

Elbaca wrote:

i forgot the mail that I used to set my Mac and couldn’t remember any passwords and my account was blocked and now I erased the Mac but can’t choose any startup disk

Take the original purchase receipt and the mac with you to the Apple store so you can remove the activation lock.