If you need any further help you are welcome to send me a direct gmail (Geekmail). Tab the envelope under my name. I am happy to get involved if you think your seller may be difficult or not understand about the double payment.
This is generally a very friendly community, so I would be surprised if you experience any major problems about resolving this.
The science of history is a great bulwark against the stream of Time; in a way it checks this irresistible flood, it holds in a tight grasp whatever it can seize floating on the surface and will not allow it to slip away into the depths of oblivion