Rebroadcasted and should now be viewable in some block explorer's other than chain.so. You can just enter this in viabtc https://pool.viabtc.com/tools/txaccelerator. Make sure to hit the Submit button at XX:59:59 (Use a timer) since 100 slots will be available at the start of an hour e.g. 12:00:00
EDIT: "Transaction added to acceleration queue". You should expect a confirmation in a few hours
EDIT 2: This has been added on block 503552 by viabtc
I didn't finish the chain but it is most likely spending from a long chain of unconfirmed outputs so your transaction will not be able to confirm unless his parent does. It might be better to just wait it out until most nodes have dropped them since it will be spendable again. Which wallet are you using?
.....
.........
............
https://chain.so/tx/BTC/553922a3d79f76c74767d2abf93fd0af9c77142a7ffc772a4535bcc1d48c6fae
https://chain.so/tx/BTC/7d365c289600ddb349aa133963d90dd7f9c5f747b826b5fcf443f81bd0ee803c
https://chain.so/tx/BTC/117bdb600495ed5a0040165272853f83c6add084c7cb3778649e8f68cec191ee
https://chain.so/tx/BTC/a556feb9ec509f7eaea3d951b16751cbec913f393ccce66344e1967b3519a24e
https://chain.so/tx/BTC/15948c7f6904bcf0bead3f7f61d61cdccab48455b74fabfd52e1edc7eb0adb35 (X)