The site rarely loads anything, even after multiple refreshes and loading more.
The messages sent through nostr:nprofile1qqs2xugc5jyguqkj36rk0syv4tmnkjdtmtperttl7x9rqjy3ustdcvcppemhxue69uhkummn9ekx7mp0qy2hwumn8ghj7un9d3shjtnyv9kh2uewd9hj7qg6waehxw309aek2mnyd96zumn0wdnxcctjv5hxxmmd9uxa0uz8 are NIP-17 gift-wrapped DMs, so if your usual client doesn't support them (currently only Amethyst, Coracle, and 0xchat do if I'm not mistaken), you have to head over to the site to view them under "inquiries."
Discussion
The products you just have to click "load more" a few times until your products show up; after 2 weeks they aren't loaded immediately anymore. For the messages, if nothing is coming up it must be that the payments were delivered with a NIP-04 DM rather than a gift-wrapped one, and that is no linger supported.
If nothing is coming up still, in both cases that would mean the relays you're connected to didn't receive those events or have been deleted.