What can be done if client is not honoring our agreement for financial services?

I am a financial consultant, and I have a client who (I believe) is not honoring our signed and dated agreement for financial services. The key paragraph in the Agreement reads: "As further consideration to Consultant, Client agrees not to obtain financing from Lenders/Investors supplied by Consultant, either directly or through third parties, without prior written consent of Consultant, for a period of two (2) years from the date of this agreement except through Consultant and that a separate agreement shall be required for these services." I learned earlier today that this client behind my back has found an investor for his product, and is now cutting me out. He, I believe, is not allowed to reach out to potential investors on his own without my written approval.