Hello!
Could you please tell me, what kind of paypal integration do you have ? Website payments standard / advanced, ExpressCheckout? Do you know about it ? Also, could you please point me to the ilance platform website you're using? You can see from even my quite recent reviews/history a couple of similar paypal debugging projects, and I don't think the technical skills would be an issue for me working on your project. I'm available to start working right away, the project will be completed within 24h once awarded.
Regards,
Dragos