It is extremely dangerous to send money after only receiving a request via email. There should be an address on the receipt for reference. You may need to try again at a different time of the day if you find the "Chat with us" link is unavailable or inoperative. Even a simple search can turn up our company info from a government website. After authenticating your identity, you may ask them to change your money transfer request.
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Otherwise, Pure GCE gets my vote. Good product except the product isn't the best. I've tried a few different brands and this isn't the worst but it's not the best. Personally I would recommend another brand.