Makes sense.
Just wondering, was there no provision to dispute that purchase for that plugin if the developer isn't responding?
P.s ..why not get a plugin coded, then resell it? Profit? I got a plugin specially developed for Payeezy payment gateway to support 3D secure payments, had my client pay $1k for the same, but it paid off in a longer run. I think at least get an estimate from some developer, we forum members can help you bear the cost for the same. Just a thought.