Hello aspirant

You have paid neet registration fees twice then you must be aware of it. You must be having receipt , you haven't mentioned , time at which you have paid must be written on thd receipt . If you havd got two receipts then you can send a mail to Examination authorities or nta mentioning your issue .

Generally the registration  fees paid once can not  be returned . Then too you may send an official mail so that yoh may get refund of the fees .