SOAP API Integration onto Wix platform

We require the integration of a product suppliers SOAP based API, with a Wix website. Third party apps may need to be used in case of any potential compatibility issues. Example codes will be provided, as well as link for documentation including Schema location and Endpoints. Here are the actions required:

1) Checking stock balances on supplier website and synching stock balances with our website.
2) After payment on Wix, create an order on supplier website.
3) Once tracking details are provided by supplier website (after order dispatch) automate customer notification of dispatch along with tracking details.

Please state your price. Thanks