Ok I didn’t do enough research but as it stands I either send the phone to the repair center or it’s as good as paperweight.
For everyone that makes supid mistakes like mine this thread on the fairphone community forum can help to some extent as it contains a compendium of many of the ways i tried to unbrick my phone.
To recap the os is in some way corrupted or some security protocol has been enacted and the bootloader is relocked, fastboot flashing get_unlock_ability (or similar) returns 0 unless some shady way is found the only way is to get it unlocked by Fairphone.
I won’t be flagging this as a solution because it’s not, maybe in the meantime that the Fairphone support replies I will try more options and post if I find anything useful.
Thanks for the help!