Dial Plan is needed for "Pay By Credit Card"

Hi All We currently using A2billing for account management, and we have created our own column in database for stone encrypted credit card details also push information onto an in house made middle ware via API interface. What we need now is someone how could help us wring an Dial Plan , so when someone ring an particular incoming number that has been configured in A2billing ( asterisk based), it would answer the phone call (IVR), and ask for invoice number, which need to be verified for amount via API, read the amount back to client via text to voice ( English and Chinese Engine ) , input of credit card details , expire date, and CVV, then update into database ( or into API), and trigger a script ( you just need to write the class, we will write the rest of the script to mark the payment off), confirm with client said , thanks for your payment, your receipt number is XXXXX, also write this into the database or send it off via API. Job Done. We could provide any relevant environment to you if you needed.