it it was cancelled for less than 30 days it should come back
go into settings and turn icloud music ON
I assume that you checked for the icloud music and did not just assume it was never turned off ?
have you got a computer ?
you should be able to look in the itunes in the computer and see whether the songs are there
you can re download them using the instructions on this page
it should carry over to the ipad if you are using the same apple id