I need someone who is able to fix my Multivendor website . WCFM

I have some little issues and something to add to my website.

1. Login Fix. I changed the child theme and after that I don't see the login anymore. I attached some picture. But when I changed the child theme it appears the logins and all the details and everything seems to be fine.
2.Social Login must be added and people to be able to signup through social logins.
3.Affiliate fix. I have affiliate plugin but when is activated users can't import products. I don't exactly what is the issue. If you know a much better affiliate plugin for what I need we can do it.
4.wordpress + woocommerce + theme update in safe.
5.User login - must be added submit ticket, my tickets
6.To be added 2 categories in menu
7.The website it had Dokan plugin. Must delete the pages from dokan
8.Integrate email service automation with my website. Mailchimp or others
9.Website to be able upload more than 1Gb. It can be done with a plugin but the upload is very slow in this condition, maybe you can make to be faster
10.Sitemap
11. Word vendor to be replaced with seller everywhere it appears.