We have tens of thousands of sports bettors and some members of this forum can confirm it. So we do take sports bet, and we in fact have taken millions of them.
Seeing your description, I believe what happened is most likely that your entire account been rejected by our sports betting provider. This has happened before.
Please note that we do not make decisions to reject bets or refuse to take bets from players, at least not at this time. Our sports betting provider does it on their end, and unfortunately there isn't much we can do about this. They maintain and constantly update certain blacklists with metrics that they won't disclose to us, and if some of your footprints hit a match in any of the blacklists, they will reject the entire account before you even place a single bet.
If you want to complete the withdraw wagering requirement as risk-free as possible, I would recommend wagering on our in-house Dice game. You can set the house edge/odds by yourself and easily complete the wagering requirement with minimal risk.
Feel free to DM me your TrustDice user id and I can take a look for you to check if this is the case. But like I said, it does sound like it.
Hope this helps.
TrustDice Team