Wowonder IOS app

I have a Wowonder IOS app already uploaded to Testflight but I need some edits made.

I need:

Change splash page
Change logo to top of screen
Change colors to 0000ff
Change font
Fix bugs
Complete whatever else is needed to publish the app

https://codecanyon.net/item/wowonder-combined-chat-timeline-and-news-feed-application-for-wowonder-php-script/27635728