Customize appointments drag and drop calendar in Codeigniter site

PLEASE READ ALL BEFORE YOU BID we need expert to customize a calendar in our website, we already have a calendar if you can fix it its good if you cant fix it and want to create a new one that work on our website its good too, we use Fullcalendar in our site ( [login to view URL] ). the calendar use drag and drop so its very important to know what you are doing. the system have 4 calendars connected to each others. and we need them all to work togother so be ready to connect this calendar to the other calendars if needed and if other calendars need fixes and work you will do it as well. please keep in mind the system is big so we cant change the system we need the calendar to work on the system, DO NOT ASK ME TO CHANGE MY SYSTEM TO MAKE UR CALENDAR WORK ON IT 1 - in the doctor section where doctor can see his next appointments 2 - customer section where customers can create appointment and see when the doctor is available and when he is booked and what available time to book him 3 - calendar where doctor can access to create appointments 4 - the receptionest calendar ( see the attachment ) where receptionest can see the doctors appointments and can control it ( the receptionest calendar have a settings page where he/she can choose which doctors to show and the time slots be 10Min or 15min or what ever he/she wants ) Note: Check attachment to see the features we asking for, and remember this is SOME of the features not all, there is some more but this is the main things we face problem with Note 2: i created milestone before to a developer and he didnt finish it and tried to steal my milestone using dispute, so i wont create milestone unless i am very sure you can do it, if you have problem with that dont bid