Thank you for your post and welcome to the PayPal Community. I am sorry to hear about this experience. In this case, I would advise you to double check with the sender that the right email address and details are entered when making the payment and try one more time.
If the buyer is still running into difficulties to complete the payment, you can also send a payment request as a work around. Here is how http://ow.ly/OY9Iw.
