Is it permissible to bypass the real estate broker and reach the seller directly, or to deal with other brokers, due to conflicting information and the initial broker's lack of seriousness in completing the transaction?

There is no objection to bypassing an intermediary and dealing directly with the owner or other intermediaries. However, if the sale is completed through your mediation, the intermediary who presented the property to you is entitled to a portion of the mediation fee you receive, estimated according to custom, in return for their guidance to the property. If an intermediary learns of an intention to sell through another intermediary and contacts the owner to become a direct intermediary, the preponderant opinion is that the first intermediary is entitled to a portion of the mediation fee, because they participated in the work by informing the second intermediary, this is if the information was provided with the intention of seeking compensation.