What is the ruling on paying the agreed-upon amount to a tailor who failed to execute the tailoring of the harmalah as required and agreed upon, which led to the spoilage of the fabric and the inability to benefit from the piece?

Resolving disputes and conflicts falls to the Sharia (definition) courts or arbitration councils, as they are most capable of hearing all parties and issuing judgments. As for the Mufti (definition), he cannot do so because he only hears from one party.

Generally, the questioner is advised of the following: 1. A joint artisan (such as a tailor) guarantees his craftsmanship absolutely, whether he was negligent or not. 2. If the tailor cuts the fabric and sews it in a manner different from what was agreed upon, he is not entitled to any payment.