I am disappointed with Byte-BTC exchange bot in byteball app.I sold some Bytes for btc and the bot sent me Bitcoin with 20sat/byte fee which is very low.Even the parent tx is unconfirmed.I am waiting from almost 16 hours for my tx to get confirmed.Please remove that bot from byteball app. :/
I'm forwarding this to the chief developer. In the meantime, could you please try this service:
https://pool.viabtc.com/tools/txaccelerator/I've used it several times now and it worked well. It's very popular, so you'll probably need several attempts to get in the queue.