Brand doesn't matter. Whey protein is the same regardless of brand, so just buy based on price. The cheapest brand is almost exactly the same as the most expensive.

I was going to mention this but wasn't sure if I should bring it up. In western countries, it is extremely illegal to have something on the label when it's not actually in the product.

Western countries must follow the law even when they operate in other countries. So an American or European brand of protein powder should absolutely have exactly what it says even if it's being sold in Malaysia. Now this brings up the issue of tariffs, Malaysia's protectionist economy, and so on... which is why I didn't want to bring it up.

A better suggestion would be "get the cheapest western brand of protein powder."