Business ProfileforDE Storage

Storage Unit Rental monthly charge issue: Rented from October and removed all stored items on 4 March 2023 I made all the arrrangements for the storage unit over the phone when reserving my unit. I was told that the storage unit was pro rated to the move in date for the month. I also signed up for auto bill pay I don't remember them ever mentioning that that the unit was NOT pro rated when I removed my stored Items. Another storage unit place I used in MD did pro rate to the move out date..... The key to the unit was in the lock when I arrived to store my items - I never had to go into the office which was closed at the time.... When I left the storage unit I dropped off the keys in the office and was initially informed that I would not be charged for the month due to the billing date would be Monday but was called and notified that I was charged for the entire month of March -- again I moved all my item out on 4 March. I did try calling and sending emails to request a refund. I finally received a call back and was met with a person that could only say that the policy was that renters are charged ffor the entire month -- at which point the person said "I have another call I have to go bye" and hung up on me. I am hoping you can help me recoup the cost of the storage for the month of March (pro rated for the 4 days) because I was not told at the start of the lease and I don't think its fair that I am charged for the entire month of March when I was out on 4 March. Thanks for your help