when will the sender receive the money? Tell me how do you know this information? 
According to the standard, the transaction must "go out of thin air" if it does not pass through 336 hours after it was sent. This despite the fact that the sender did not include the function "replace by fee" on the purse and was not carried out "double spend"I did not Double spent. I only used third party services to promote transactions, and all to no avail. So how can I be? My transaction be confirmed? 
I regret: mempool min fee not met
In all likelihood, you did the wrong procedure Double spent.
No it will not be confirmed. Some of the pools have already rejected it. Money returned to the sender. In all likelihood, the wrong actions of third-party services led to this. I regret.dear friends, help with a dangling transaction, 've tried everything. If you can help, leave a bitcoin address, I will compensate you (it is better to leave the wallet Ethereum, as a bitcoin Commission is very high) My transaction bitcoin efc66a3b991382a331f3631b79bf31b0bef2d9c344f776abae20021ba882721d or https://blockchain.info/tx/efc66a3b991382a331f3631b79bf31b0bef2d9c344f776abae20021ba882721d
addedI regret: mempool min fee not met
In all likelihood, you did the wrong procedure Double spent.