I believe you might have missed it, but after processing the payment, a small window appears with the download link.
If you don't hear back from support, feel free to DM me and I'll share the download with you since I also purchased it yesterday.
https://producersources.com/product/fl-studio-all-plugins-edition
Apply COUPON CODE :SP-BF-EXTRA10
10% cheaper than the official ongoing sale and across retailers.
some research about the roducersources.com:
website registered on 2016 with a good reputation at scamadviser.com
https://www.scamadviser.com/check-website/producersources.com
some discussion on reddit