Urgent - Get new payment method to work in Magento Payment Module

We have a magento payment method. Now the payment provider has a new payment type. For this we included the new payment method but its not working as it should. This payment method is a mobilephone verification system. When people choose this method - it sends now a message to accept payment or decline and the webstore should load and do "checks" in the payment string if it has be authorized or declined. We need to have this check implementated and if authorized on phone then the order should get status pending - and if its declined or timed out it should cancell the order! Now when peple pay they just get to the first page and the order has status cancelled as it hasnt got this message back! Must start asap. and for testing you should let us know, as we have the payment app on our phone.