IONIC DEVELOPER to fix few bugs for our woocommerce store ASAP

Hi Everybody, Looking for a GURU IONIC developer to fix my app bugs listed below: 1. Checkout: app is not creating the order when customer apply CUPON CODE or when customer select FREE SHIPPING using any payment option (cash on delivery, wire transfer, stripe, paypal, payeezy, account funds) 2. App is not taking the customer to PayPal page to make the payment and complete the order 3. Write API for Payeezy and Account funds gateways to process a successful order 4. Registration is not working, customer got a warming message that username/or email is invalid in the moment of the registration, but the customer got registered as subscriber instead customer in the wordpress and the app keep showing loading without taking the customer anywhere. 5. Write API for the app only show the attributes assigned to each category, for example a category that contain electronics should give the option to the customer to filter by attributes that belong to that particular category, right now the app show all the attributes no matter if the attribute is not assigned to a product, means the app show clothing attributes inside electronics categories. (please see attachment) Note: App use JSON API and JSON API User wordpress plugins and Woocommerce API Thanks in advance!