Something is worn or broken. The firing pin block has to be installed from the top. To access the part you have to remove the breech block. Your pistol has a lifetime warranty if you are in the States. You can call Ft. Smith and they will e-mail you a shipping label. I don't see why they need more than the slide but they will advise. The breech block consists of a retaining roll pin, the breech block, drop safety, tiny spring, firing pin and firing pin reset spring.
It isn't hard to replace but you do have to very carefully insert the assembled system into the slide without displacing the tiny spring that sits on top of the safety.
In the interim, you can't safely fire the pistol. I fired a pistol for months without the safety installed... until one day I took a close look at my brass....there were double firing pin marks on them and I was lucky none ever fired. I assume the firing pin was slamming into the rim when the slide closed. Fortunately not quite enough to ignite one...but, the indentation was very clear and I think right on the edge of ignition.
Above is a picture of an original breech block and a later style. The newer one is on the top and the change was to add an additional block on the right side of the channel to support and guide the nose of the firing pin. To remove the breech block you have to rotate the safety levers to safe, support the slide and drive out the serrated roll pin. Then, rotate the safety levers to the fire position in order to unlock the firing pin so the breech block can be tapped forward and removed from the slide.
Also, your extractor retaining pin has dropped down. Ask them to look at that also while it is there. This is the first time in over 15 years I've ever read of anyone having this problem. You need a new breech block and safety I expect. 1917