Security Mailbox

I’ve had a mailbox here for many years, but I’m looking to cancel it
as it doesn’t serve my purposes. I originally signed up to have a separate address for mail I didn’t want going to my residence, and so someone would be able to receive packages when I’m not home to sign for them.
Here the big problem is it is not regularly attended during the posted business hours. This isn’t a problem if you just have regular mail, but if you need to pick up a package that doesn’t fit in your mailbox then you have to go there when someone is there to pick it up from.
When you call the business phone # during the day, you get a generic message: «Hello, no one is available to take your call».
How un-​professional is that?
The only good thing about this place it is CHEAP, but then, you get what you pay for, right?
I’m presently looking for another service. The only benefit of this one is that it is cheap.