Downloading service pack

Hello Experts,
We are migrating from wM8.2 to wM9.8 . We want to apply a patch on the wM8.2.1 . For that,
Can you help me in downloading the service pack from Update Manager for wM8.2.1, Also how can we get the Support Patch Key to download the patch.
Thanks in advance.

Thanks & Regards,

You can download them by using your client official empower id. Kindly contact your ATC.