Hot fixes for Magento2 multi-vendor e-commerce website

Our website is a multi-vendor marketplace (exactly like amazon's business model) with multiple sellers. We have recently released our new platform built using Magento2 which later turned out to have a considerable amount of bugs and stability issues. Our current need is only to make the website stable, in order to do so we need a PHP web development recourse with ample knowledge in PHP. Website URL: [login to view URL] 1- Plugin activation Installation: Activate vendor login & dashboard from our existing purchased multi-vendor plugin. 2- Mobile drop-down list Hot fix: Mobile view, dropdown menu (left bar) isn't working correctly. It was working but now it is disabled. It's content needs to be editted as well (login, language, currency..etc.). 3- Register Hot fix: We need to add sms verification for registering users. 4- PNG homepage Hot fix: Due to performance, homepage side banners are being transformed. from PNG to Jpeg, we need it to stay PNG 5- Footer content Hot fix: Some content on mobile view isn't clickable 6- Multi language view: Some information isn't translated correctly 7- Side scroll: Moves in the opposite direction of the arrow 8- List alignment: Lists aren't alligned correctly per store view 9- Social login Hot fix: Facebook, twitter & gmail 10- In-store filter: Activate in store filters 11- Store name: Store name format fixing, it currently does not accept spaces or capital letters, we need it to accept spaces and capital letters 12- Store URL: Stores need to have a special URL, for example: [login to view URL] We estimate the work around 30 hours, however we would like to know your estimate as well.