I also has no problems with coinbene, but I prefer trusted exchange like binance and bitmex.
Speaking about places where I can change fiat and buy btc, that is definitely Indacoin. So mate, once you get money from coinbene, find something more reputable instead
maybe there are people who experience something different from you so that it might be appropriate to say that other possibilities might happen. or there is an information error that cannot be resolved properly. so that coinbane gets its impact and it doesn't quickly search for problems. if indeed it often happens there is nothing wrong also to avoid because there are still quite a lot of good exchanges such as binance, HitBTC etc.