I have voted for my delegate for days but I don't receive the stake.
i had arkland but he hadn't been giving stakes for 6 months, now i voted biz_classic but he doesn't give me the rewards.
Where am I doing wrong? the stake is not day by day?
You need to pay attention to the delegate landscape, arkland has not been a forging delegate for a very very long time. Other than that, you need to contact your delegate if you are not getting whats promised. slack.ark.io is where everyone is to talk to. you can also research delegates here
https://arkdelegates.live/delegates. there is also this community built service
https://arkifier.net/, that will email you when your delegate drops out.