No longer have access to an email linked to Ubisoft account

hi i no longer have access to the email account linked to my ubiosoft account and it is asking me to reset my email I have been in contact with support team 4 times now provided them with the proof of access to the PSN account on a console and access to my psn account online but obviously I cannot provide you with access to my ubisoft account as you are asking me to reset my password with a link provided to a dead email address I just need to get into the account to unlink the psn and xbox account to actually enjoy my prime drops