I am using HitBTC to buy and sell for several months, because only there are tokens that interest me and have never had problems with them. There were no even delays.
I hold there over $10k.
Have you ever tried withdrawing larger sums or even moving them from trading to main part of your account? You might be surprised...
Yes, I withdraw many little amounts, but last time bigger amount i withdraw almost two months ago it was 2.45487167 BTC:
https://blockchain.info/tx/22af638703f3ad8f89f1aa6b4a74ec5517bd0b60d48a9efa42b6725861e58bf7Everything went very smooth.