Bicycle I used for getting to work stolen need help (Dilworth)

My 21-speed Fat Tire Trek bike was stolen from a convenience store and it was my only means of getting back and forth to my job I do not have money to replace it I'm wondering if anybody has an extra bicycle that they could get rid of at either very low cost or nothing I don't have the extra money to buy another one.
It's hard for me to get around I'm 60 years old and I need a full size bike that's easy to ride thank you for any suggestions