that seems to only happen when they can keep your coins and profit due to rising prices.. basically giving themselves a free loan and free coins.. super scammy.. I had made 20 purchases with them, and then initiated a buy at $180.. by the time i became "high risk" it had rocketed to $400+.. i've heard they honor these prices but they have failed to respond to my emails for months.. They selectively scam their customers.. I quit giving them business too and wouldn't advise anyone to do business with conbase.
I believe they're just working on fraud prevention. No need to sound the alarm. I bought bitcoins and my transactions were deemed high risk and cancelled after they received the money and held onto it for some time. Price actually went down from when I bought.
However, their customer service could definitely be improved. It's been over 9 days since I sent a request with no response and my transactions keep getting denied.