1) Make sure that your account is 100% verified and that you have send to them all thier required documents to thier compliance department.
2) According to the Big Option Terms & Conditions, the minimum withdrawal is 250$ and the minimum wire profit is 300$, Make sure you are withdrawing with the accepted amount.
3) Dont Gamble again with them! Contact with thier expert traders who can give you a good customer support but dont invest your money if they ask you to invest.
4) You must pay them the withdrawal fee and the charge which will cost 35$ via credit card/ 50$ via wire transfer ( its not for free)
5) In "Banking History" you must see if your withdrawal is "approved" and if it is approved then you will have to wait 21 buisness days in order to get that cash from the bank.
I feel so sorry that you have lost 1250$, Dont gamble again in binary options, you can experience your trades in this website - demo.ayrex.com , no registration is needed and you learn how to trade with this fake money.
Good Luck! Tell me if you still have the problem I will help you as much as i can.