Bug fix for php social network

Hello bidders. My previous developer who was working on adding the events functionality for my social network has vanished and abandoned project. He has built the functionality but there are some bugs left. I require a senior php developer to fix the bugs listed below. The code is very delicate and i need a dedicated individual no agencies. If you do a great job I have much more exciting projects on the way ahead of media company launch. New Issue: Admin > Manage Events: The event expiry date column with data is not appearing on Manage Events. New Issue: The date cursor box has no left or right arrows to change month. Months change but the arrows are invisible / not showing. (css issue) New Issue: Rename fields for the event page 'Join' to 'Attend' and the field 'Members' to 'Attendees'. and the field for event admin "Add members' to 'Invite Members'. - New Issue: If the event Date End passes, the delete event link to be displayed on event page for the admin of event. After 7 days of event expiry time, for this not to appear on search results. If Event Finished then not allow the admins of the event to invite users . Hide Add/Invite Members icon on the event. New Issue: The group functionality which was cloned and called events, but the notifications do not appear for events. If event admin adds member to event then the user notification receives notification " has invited you to the event on ". When the user clicks on notification it will allow and take the invited user to the event page where and the Joined icon will prompt a "Join event Yes/No". If user selects "Yes" then the joined icon will remain 'Joined' and if user selects "No" then the user is returned to the their home screen and marked as 'not attending' and should not allow the event admin to invite again as they are flagged 'not attending'. New Issue: On manage events admin section > edit event there are no custom fields which appear on event. The fields Start date: ,End date: , Contact:,Location:,Website: and Ticket: are not appearing (available for admin to edit). New Issue: After creating event, it does not appear on more page (events listed for use) New Issue: Video or audio from user post's are not deleted from server folders when user deletes video or audio file post. Awaiting developer to fix. New Issue: User unable to like photo, share photo when viewing photo from a user album. The icons no longer work. New Requirement: If a group admin adds member to their group, the user only to be added if they accept 'Yes/'No' after clicking on the notification "user added you to the group, do you accept Y/N". The notification is currently displaying "user added you to the group". This is in place automatically but I want the user to accept Y or No. -