Sorry, I just posted almost a dupe of this thread but I'm having the exact same issue. After payment, PayPal attempts to redirect back to ACC, but the page never loads. The payment has been fully processed on my end, and I have the PayPal confirmation email if required.
I'm not sure if it's relevant but I'm using Safari on MacOS 10.13.4
So literally just now, I was just telling my husband there was someone else on here having the same issue. He checks our bank and the two extra charges have been removed. No idea who did it though as we had no luck contacting pay pal.. aside from sitting on hold for four hours before hanging up.
So at least that issue is sorted, now I'm just hoping that the remaining charge goes to where it needs to go as it still has pending status in my bank.
[i][b][color=mediumpurple]Some things you see with your eyes. Others, you see with your heart.[/color][/i][/b]