Mediation Required for Payment Dispute

I need professional mediation services to help me resolve a payment dispute with a former client, Brett. - Background: I worked with Brett for seven months to help grow his audience and revenue. This included hiring a contractor to assist with tasks. Despite generating significant results, including $33k in revenue from a webinar, Brett has refused to pay the agreed percentage of earnings, claiming I had no involvement. - Current Situation: He also owes me $3k, which he initially claimed was stuck in Payoneer but later admitted he would pay when he has funds. - Issues: His delays, lack of transparency, and refusal to provide proof of transactions have caused me immense frustration and mental stress over the past two months, leaving me in financial distress and without a clear resolution. The goal of the mediation is to secure the full payment of the money owed to me. I hope you can help facilitate a fair and timely resolution.