Already did this is what they said:
I am sorry to hear that there is an issue with the payment method. Here is a list of Webflow’s supported payment methods: http://help.webflow.com/faq/what-are-webflows-supported-payment-types
I expect support for PayPal to be added, but it is not yet supported, and I do not have an ETA for that yet. If you have some extra time, I would like to hear your thoughts on the Wish List: http://forum.webflow.com/t/paypal-bitcoin-and-other-unsupported-payment-options/4492