I bought Cyberpunk 2077 6 days ago and the payment is still being verified(i´m from Brazil and chose via credit card),should I try another payment option or should I give it more time?

Normally payment is verified pretty much instantly. There may be some situations where it may take some minutes, but over half an hour, if not even 15 min, likely means it couldn't be verified, so maybe some fraud prevention system somewhere went overactive and blocked it. If it took days, it quite clearly won't get sorted out on its own, so you should probably contact your bank to see what happened.

I always buy with boleto bancário and never had a problem (the downside is the fee you have to pay (R$1,50) for every transaction). Now GOG also offers google pay, if you have a credit card registered there.

Waiting 6 days is not normal, you should check what happened with your bank.