Cannot reset password  id via mail (no mail sent)

Hi...!

This mail call for help...

My apple ID : xxxx@gmail.com have a problem....

My password too easy so every one can guess it. One day i found that some one've changed the password...i use "i forgot password" to recover password by my mail. But checking xxx@gmail.com i dont see any mail to recovery the password any more since the last day the infomaition be chaneged( according to the last mail, 3 mails) i have suppect that some one have changed the mail also, so recovery mail be sent to others..◦

I ve tried many times with "i fogot password" but useless...pls help ...because the id very importance to me....

Thank alot