iMac restore, help needed asap please

i tried restoring my imac,

it was all okay

it came up with the OS X utilities ,

i try to reinstall OS X yosemite i enter my apple id and it keeps coming up with 'temperalily unavalaible'

i tried playing around with the disk utilities but i noticed on the left it doesnt come up with 'Macintosh HD' its only this '1 TB ST3100052BAS Media' 'Mac OS X install ESD'

a greyed out 'superdrive'

no disks,

i just forgot my password and done it the most difficultest way

please help asap, i kinda needa return it tomorrow..