Thanks for notifying this issue. I also started using their trading platform but never knew that they would send fake coins which users have created in their account.
Sounds like people are abusing their "securities trading" platform with a simple bait and switch scam. Have you done any research into people behind it at all? Your post will help other people in future, but it's so easy to fake an identity on the internet and hide over the internet that you have probably lost your money. What made you test this platform in the first place, did you see an advert for it somewhere? Do they have a website or is it purely a phone application?
It's within the main waves wallet itself:
https://waveswallet.io/People can create their own assets and name them as per their wish. One wouldn't even know which is a fake btc or real one while buying/selling.