Paypal payments not registering
I have Vantage installed on my website at www.cardandgiftnetwork.com/directory
I have been testing the Paypal integration in live mode with small values and the system is not registering the payments.
I choose a listing, click buy, go through the Paypal screens and get a message that the payment has been successful (this is confirmed with the payments showing as credits on my Paypal dashboard). I am then redirected back to a blank page on my site, I don't get any success message in Vantage and am not taken to the homepage. When I check the listings in the dashboard they are showing as "this listing is waiting payment". and I have the option to reset gateway or paynow, both take me back to pay for the listing again. (screenshots of blank return screen & dashboard after payment attached)
I had this set up and working last year, but the project had to be put on hiatus and I am picking it up again after a long break. I thought something might have gone offline during the break, so I spoke to Paypal and they say everything is still valid and appears to be OK.
I've confirmed all the settings and I don't know what else to try. Can you help?