My account has been blocked and i tried to receive the code but i never did why?

If you didn't receive your security code on your email address, you can opt to get it on your phone number that you may have registered at the time of signing up. If you don't receive the code on the phone number you entered, try again or try a different number by clicking I don't have a code. You'll be presented with another opportunity to request a code. For more details, you can refer to the following link:
http://windows.microsoft.com/en-IN/windows/outlook/account-temporarily-blocked

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As you are not able to receive the verification code, it is recommended to check if the mobile number you have entered is correct. If you think it is correct, the next thing you can do is to contact your mobile carrier and see if they have blocked any message sent to you by Yahoo.

If the issue still persists, the other option you have at hand is to ask Yahoo to send you the security code on your alternate email address that you may have mentioned in your Yahoo profile. The following link can be useful:
https://help.yahoo.com/kb/troubleshooting-options-sln3139.html

If you are not able to receive code on your alternate email address too, you may need to answer the secret questions associated with your Yahoo account. To know how to do this, the following link can be helpful:
https://help.yahoo.com/kb/recovering-lost-forgotten-password-sln2047.html

The following links can also be useful:
https://help.yahoo.com/kb/yahoo-account/account-hacked-sln2090.html

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create another account and provide it.

You get that when you are trying to use account without proper password. Are you trying to get into your account or someone elses?

because you have tried this a lot of time. According to Facebook TOS these type of activity block the account. Try the forgot password then you will received email. If this is again then make a new Facebook account.

switch to yahoo mail account maybe hotmail have problem recieving email..or pop block outgoing email

Some mail providers view facebook emails as spam and block it. Check your junkmail folder or call your email provider to see if they block it.

i had the same problem and i solved it ^^ , if u have hotmail go to your hotmail options and u will find blocked email contact's and there u will see something like facebooksuport+#[email protected] , unblock that contact and u then click send security code and mail will come to your inbox ^^ i hope it will work for you ;) cya :D

I\ve written the instructions on how to get your puk code on this page