Hello,
Thank you for posting your query.
As mentioned by you the agreement specifically provides for dispute resolution through arbitration. In that case you must give a notice to the other side to initiate arbitration proceedings. There may be either one arbitrator as mutually decided by both the parties. Or there could be three arbitrators (panel).
Once the panel is formed, the panel will determine its procedure, and as per the procedure go ahead with the dispute. Both the parties will be given hearing and will be required to submit their respective claims. Thereafter the panel will give its award which will be binding upon both the parties.
Regards,