A week ago I twice swapped ADA for THETA on SimpleSwap. All went well, took less than 20 minutes. I attempted a third swap four days ago and SimpleSwap has taken my coins and will not return them. Based on a few internet reviews, SimpleSwap uses the same language with everyone they steal from: "technical issue", "stuck on our liquidity providers' side", "we need more time to proceed this exchange", etc. Meanwhile they typically reply to further inquiries with robotic scripted answers such as "We will be back with update within X hours", "Thank you for understanding", "Your question will be forwarded to the management department for further clarification", etc. I really wanted to trust them and give them ample time to right the ship. However, after four days of inept replies, it is crystal clear that they had no intention of dong so. Say away from SimpleSwap if you value your assets.