The only answer they send us is to contact our Marketo support admin, who has left the company...
Hi Gregoire,
XXX from Marketo Support.
I am unable to make any change to your Manage Authorized Contacts. I get the following error:
You do not have access to manage support contacts for your company. If there is a need to adjust your list of support contacts, please contact your Marketo Support Admin John Doe (jdoe@domain.com).
This is a Marketo Community related issue. Please contact supportfeedback@marketo.com to proceed further.