changing the authority for download my website

Envato Authors CodeCanyon
1

one of my employees bought this website


but he suddenly left the job, now I can’t download the latest version of the website so can you help me with this.
I have the bills, bank reference number for the payment and the website code. I have all reference if needed
2

unfortunately, it will only be available to the purchasing account. Without access to that account, it will not be possible

3

no other solution
he even didn’t accept to download it and send it to me