Unable to unsinstal Forticlient - ZTFA v7.0

Hello,

I can't uninstall FortiClient Zero Trust Fabric Agent. When launching the forticlient setup to uninstall, I have only the repair option that is activated. ( if i launch this one i have a fatal error). Below the "Remove" grey button, it is indicated:   "Forticlient cannot be removed while registered to EMS".

I can't use it anymore because I think that since v7 the VPN tab is not available. My client with whom i use a vpn connection asked me to install an old version of forticlient. 

Could you please help ?