Finally! After months of frustration, I didn’t lose hope and always tried to make my script the best, my first script was hard rejected twice and it was the time I said to myself that Envato is biased, I was figuring out the issues by myself that what was the reason my item was rejected twice but found nothing helpful.
After few weeks I had an idea that why not I ask from the senior members about my mistakes and why my item isn’t accepted, that day I created this thread and thanks to this helpful community I got to know more about the review process and started working on re-creating the script from scratch and followed the guidelines of seniors and after a month yesterday night I upload my script and after few soft rejections my item is now approved and live 
Special thanks to @SpaceStockFootage @charlie4282 @baileyherbert and all other guys who supported me through this whole period 
Item Url: https://codecanyon.net/item/tiktok-video-downloader-audio-extractor/27322639
Anyone who’s viewing this thread and his item is hard rejected don’t lose hope, come back with more solid product and it’ll surely be approved.