one of my clients used my login details to post this complain
Go there and choose your reason and get support by envato
You can contact support using the link shared by @CodeDaddy above but be aware that envato make it clear that they cannot guarantee item lifespan nor prevent items being removed. If you are within the initial 6 months then you stand a better chance of a refund but it is not guaranteed.
In regard to the customisation - envato will not be able to get involved or refund this (unless you commissioned it via envato studio) as it was a private arrangement