Bike for work.

I bought this bicycle for commuting to work about 4 months ago. It was recently stolen from me a town away whiled chained to a bike rack at walmart. It wasnt very expensive but expenisve enough for me and cannot afford to replace it. This bike meant alot to me as I worked hard to be able to buy it and have it such a short amount of time. I commute to and from work 6 days a week and could really use something reliable. Any help would be greatly appreciated. Thank you very much in advance.