Nift — I have been charged the exam fee two times.

Yesterday i have filled the exam fee on nift site firstly it was failed then i again logged in my nift account and then paid the fee and then it was successful and the receipt was generated but when i got the message from bank it showed me that i have been charged two times. The fee must be deducted only one. So what to do now?? Please help and contact me. And if possible then please give me the contact number of the institute because the number which is on their site is not working.
And please help waiting for your reply...