We had an agreement (written & verbal) with an insurance adjuster (heimeish) regarding payment on a claim submitted. After settlement was reached with insurance company & we received payment on our claim the adjuster suddenly changed the terms (verbally). When I explained that we already had an agreement on his payment he continued to say that above that agreement there are other fee factors that he takes into account (NONE of which he mentioned initially when signing agreement).
I would like to know what our obligation is? The original agreement or his new demands (which is almost double the original amount)?
In general, once a fee has been agreed upon in advance. neither party may change the terms of the agreement after the service has been provided.
Nonetheless, there will be circumstances in which there are acceptable additional charges which every client is expected to know about, or additional fees for additional work that was provided that was not discussed earlier because it was not known that such additional work would be necessary. In these cases the contractor is entitled to ask for extra wages.
For a conclusive ruling in your case, you must approach a Dayan together with the contractor, so that he can hear both parties and rule accordingly.