You can find more about this here
Envato Elements does not provide technical support for any items
All items on Envato Elements are created by independent authors. Due to this and the nature of our unlimited subscription, we cannot provide direct technical support or advice on the use of items.
We do our best to ensure that items on Elements are of a high quality and free of any technical issues. All our authors are carefully reviewed and maintain a track record of creating error-free, high-quality assets.
And also at the bottom here - https://elements.envato.com/pricing
At the moment, Envato Elements is a subscription based system, meaning, yes, you pay $xxx per year for unlimited downloads. This doesn’t guarantee however, you get any form of support from the author on this, since, for example, a one month subscription that costs @$20, gets you access to files which normally cost double than that ( example, the plugin you’ve purchased: https://codecanyon.net/item/premium-seo-pack-wordpress-plugin/6109437 costs $44 normally)
However, if the item / plugin doesn’t work at all, doesn’t even allow you to use it with minimum features then I do recommend you contact Envato Elements Help and Support and let them know the plugin is completely broken, and it will be removed from Elements.
You are correct, that items that are on sale with your Elements Subscription must be functional. But in regards to support, that is not included. For the value included, in this subscription, support is just asking for too much in my humble opinion. We should also be realistic of the fact that for $200 per year (quoting your amount) you’re getting access to items worth in excess of $5.000.000. So the value is impossible to describe in words.
The representative from Envato also offered you a terrific idea. You can update the item manually using your FTP in the wp-content/plugins. If however, this is restricted, then the best alternative would be to go the classic way, purchasing a license from the author, and that will also offer you 6 month included support from them which will resolve your issue.