i lived abroad and just got back,but while there i sent money home to be banked by my mum,
it got to a million and i fixed it since 2007 but on getting back now, they said my money has been withdrawn since December 2007 by an unknown company,
the company used a cheque which was not authorised by me,
so my question is: what do i do now?
pls do reply THANKS!

U need to be around to handle, this preferably during your holiday/leave.
The bank should be able to provide information on the company that withdrew the money, the cheque no, and a copy of the cheque.
In the meantime consider making a detailed letter to EFCC if the bank is not forthcoming after writing to the bank headquaters in Lagos. Whatever you do, act fast and do not let more time pass by. By the way make everything formal, You can start by getting a lawyer makwe a letter to the bank with proof of delivery. Y

Suit them to law court if EFCC is not handling it well. Do not let them go because It is one of them that withdraw the money, if not the manager itself.

@poster
before you sue them to court. Answer this question by yourself.
Is there any missing leaflet in your checkbook?
Who is keeping your checkbook?
Did you officially put the money on fixed deposit?
If your answer justifies you, then, you need to be around to see them, then, if there is no reasonable response, you can sue them to court.

reports the matter at the bank,if they are not doing any thing about it,reports them to E.F.C.C