Hi again, Dennis and thanks for your helpful reply.
Experts have nothing to do with charges, so you would need to contact Customer Service about that:***@******.***
If what I suggested has already been tried, here are some additional suggestions:
Spray some WD-40 lightly, around the underside of the dial.
Take a rubber mallet or hammer with a towel wrapped around the head, as to not damage the safe, and hit the door above and below the dial, plus, around all the edges and top of the safe.
Also, hit and push in against the upper left corner of the door, as if you were closing it. The rubber gasket inside the door tends to swell in older safes and sometimes makes the door stick.
Sometimes, when you dial the combo, try doing it one or one half number below and/or above the correct numbers, as the dial can wear out with age.
Try tilting (if possible) the safe to the left, right and/or back, in case something inside is stuck up against the opening mechanism, inside. Then, dial the combination, following the instructions.
Make sure your handle is in the absolute horizontal position before you start. If you dial your combination and pull the handle down and it doesn't open, try turning it up.
If you're not 100% sure of your combination, you can request it through Sentry, at the following webpage:
Let me know if this helps.