Hello sir/madam,
However, I am new here in freelancer.com I have over 10 years of experience in .Net development. I have developed several applications that use Betfair API and I will be happy to work on your project too. I am offering you develop an Excel add-in for your project. Also it will be better to save data somewhere in database and use for output and reporting. Please contact me to discuss the details. Waiting for your messages.
Best regards,
Tolib Rahimov