Orders not be received in Marketpress

I have tried numerous ways to get support on this issue as well as others. I was asked yesterday to grant access to the website which I have and still no response. We are losing customers!!!!!

Customers are going through the whole process and putting in their payment info and being redirected back to the website order completed page BUT the orders are not going through. There is something wrong with this plug-in.

I have been talking to Paypal about it as well and their contention is that the plug-in isn't talking to Paypal. API is correct.

I really really need some help with this!!!!! I posted as requested that I had granted access but still no one has responded.