Complaint Review: Dish Network

I've had Dish network for about 2 years.  As a result of my job i was transferred to a new city and moved into an apartment complex.  Because of the location i was unable to continue my service.  I called customer service and was told that Dish would send some prepaid boxes so that the equipment could be returned.  I returned the equipment with what i thought were prepaid boxes but much to my surprise i recieved a bill that said that i owed for the return shipment.  Like i said before, the Dish customer service person told me that the boxes were prepaid.