No RBF or CPFP option for your transaction while it's really low priority in the mempool
So you now have two choices left.
1. The cheap method. Wait until the unconfirmed transaction is dropped from the mempool, and you resend with higher fees. It's usually takes approximately for an unconfirmed tx to get dropped. you have about 7 days more.
2. The expensive way. Pay miners to include your transaction in the next block. Both accelerators you shared are legit. pushtx.com is owned by poolin, one of the popular mining pools on Bitcoin network.
If you can't wait and don't mind paying $ 143.92 , then send it right away.