problem with affiliate link

Hi i have a website on which i have listed some affiliate products, now what customers do instead of clicking through the affiliate link they send payment to my paypal account , how to solve this problem , i have even written it clearly that to buy this product you have to visit the following link but no one bothers , how can i reverse my fortune please help

Sounds like you have your PayPal addy on your page - take it off so they won't know you have a PayPal acct or put your affiliate links/product info on another page of your site.