API call receiver and forwarder file

I have a single file of asp, I have already done some coding it, what you need to do is to go through the code, read it, add in it and correct it where necessary. Attached is a form file, which will submit info to [login to view URL] file using POST method. [login to view URL] file should 1. receive info 2. check for required fields, following five are required fields LinkId ,OrderId, Price, Subject Signature 3. should create signature 4. should check if signature match 5. then should present a form to user to choose channelID 6. user should see userid, price, as readonly values 7. user should see buyer_name and buyer_phone and these fields should be editable letting user edit and if edited then new values should be submitted 8. finally all info should be submitted to another file using get method. ONLY SERIOUS PROGRAMMER SHOW INTEREST