DIDWW api renewal with PHP

Hello, Didww is a DID (Direct inward dialing) Numbers provider. They just sell phone numbers to us to be used thru an API. Simple, there are List, Buy new, Renew, and Cancel options that can be done with this API We already have a PHP that allows us to Buy New and Cancel a DID purchased from them. We just need you to develop the "Renew option". Renew means just add more working months to our actual did number. For example, if the phone number XXXXXX expires on 05/27/14, there should be an option to renew it for "1 month/6month/1 year" We need a php script that list all our DID numbers, and allows us the posibility to renew it or extend(add more months to the subscription). There is just an api, you must create a simple php that can communicate to this api and do the renew option. We can provide you what we already have with the Buy New and Cancel option. You can find more about the Didww api here: [login to view URL] [login to view URL] Thank you