Website Back-End

Hello! I have a front-end website that was copied from another template and mixed around for my needs so it's a little jumbled but I like how the front-end looks at the moment. There is a section of the site that allows user's to input a 'IMEI' device number for an iPhone; once they enter the IMEI and press enter/go the page should unhide a section below the input buttons and scroll down to that section with information about the iPhone (I need to check iPhone Model, GSM or CDMA, if blacklist clean I can provide some API's/front-end to display it on) Once their device info is displayed their should be a button that pops up in the bottom right of the information that says 'Unlock iDevice' and once clicked there needs to be a popup or a new page that first asks a user to pick a drop off time/date from a calendar then they click next and it should then show a calendar/title to pick a pick up time; it should then ask for First Name, Last Name, phone #; It should then ask for half of the total value that they owe via stripe or PayPal. I will also need the IMEI, Customer First, Last, Phone, drop-off time, pick-up time to be displayed to me some how(I'm thinking maybe calendly/google calendar api and Display the info in the DESC of the calendar event but up to you.)