Del Taco review: store closed

I am writing because the store location at 3106 SPORTS ARENA BLVD.
SAN DIEGO, CA 92110 is always closed from 5-6 am supposedly due to doing a turn over yet sometimes they are open (very rare). This is the only location near my work and the only time I can visit the store. I have never seen another chain do this and if this is standard policy can the sign be updated to not say OPEN 24 HOURS? This is very frustrating because as a customer, I expect to be able to order at any time. It would seem if I had cash that they could write down the order and take the cash and ring it up later. I am requesting something be done for customers to order 24/7 at this location.