I withdrew around 0.7001363 BTC from one trading exchange to another around 14 hours ago and it still has 0 confirmations. I reached out the sending exchange a few hours ago and they informed me that there is nothing they can do about it.
A transaction ID would be helpful so we can look at the transaction and explain to you why it is taking so long. Then you could inform the sending exchange what they've done wrong.
What exchange were you using for the sending exchange?
What is going to happen to this transaction? Is it stuck indefinitely? Does it dissapear? Is it returned to the sender at some point? Should I have the sender follow up with any sort of action(s)?
It will most likely be confirmed eventually. If it doesn't confirm in the next few days, what will happen will depend on how the exchange sends the transaction.
It will either continue to be broadcast until a miner finally confirms it, or it will stop being broadcast (in which case the funds will be available to the exchange).