Haven't used them myself mate but did a bit of digging. They have an ebay account under some random user name.
Pair of Apistogramma sp. aff. viejita II (Dwarf Cichlid) | eBay
Reviews for this seller are mixed.
On the above linked page if you click on "Registered as a business seller" it references the name Diapteron.
Welcome! – Diapteron Shop
Looks a lovely site until you read their delivery conditions speel.
Live Stock, Plants, Foods, Supplements and Treatments
Live stock can be shipped within the United Lingdom only. All the parcels are well-protected using our know-how packing method. We can’t be responsible for extreme weather conditions, heatpack failures, wrong storage conditions, bad handling methods, delivery delays, customs issues and lost parcels. We don’t accept back or provide refunds for any type of foods, supplements, treatments, medications, dead on arrival (DOA) or damaged fish, invertebrates, plants or any other live creatures.
Going back to the ebay account if you check sellers shop and click "about" it references "aquasnack." Nothing wrong or dodgey with that but check out their delivery conditions information.
Live Stock, Plants, Foods, Supplements and Treatments
Live stock can be shipped within the United Kingdom only. All the parcels are well-protected using our know-how packing method. We can’t be responsible for extreme weather conditions, heatpack failures, wrong storage conditions, bad handling methods, delivery delays, customs issues and lost parcels.
We don’t provide refunds for the dead on arrival (DOA) or damaged fish, invertebrates, fish eggs, reptiles, amphibians, birds, rodents, live foods, plants or any other live creatures.We don’t accept back and we don’t provide refunds for any live creatures (fish, invertebrates, fish eggs, reptiles, amphibians, birds, rodents), plants, foods, supplements, treatments and medications in any circumstances!
Sorry for the long post
@Wookii they may well be a decent company but to me there's a rabbit off somewhere.