This is the worst experience I encounter and never go to Bitselr site now on because admin never bothers to help me out with this issue.
What's he supposed to do? Pay a pool to accelerate your transaction? 
What is the highest fee that you're willing to pay for a 'quick' transaction, by the way? For a recent withdrawal of mine, Stake used 150 sat/byte for a total of 0.0022 and it still took about 3 hours. It could just be the blockchain that was slow given this detail.