I'm sorry. Do you have a friend or family member that has a sewing machine you can borrow until you can get another?
If the repair costs more than the machine originally cost, do not fix it. Get yourself another machine when you have the money. Tell all your family that you want a new sewing machine for your birthday, christmas etc and hopefully They will give you the cash to get a machine later. Maybe you can promise a lap quilt or something if they want to get you one?
For now, find one you can borrow.
There are tons of people out there that have sewing machines that don't use them. Make them some pot holders in exchange or something
I would be lost without my machine. I currently have another in the garage I can use if my good machine needs to go into the hospital.