Can anyone help get this transaction confirmation?

[Saint-loup]

I don't understand why you want to reduce it and you're dividing f*(S_A+S_B) - S_A*f_A by the length of the new transaction.

Note that f_B is the fee rate you should use for the new transaction.
[...]

My bad, I have been blinded by the question you were replying to  . But you're right usually we choose the fee rate, not the final fee.

[JeromeTash]

• Besides some free accelerators above, you can check Free BTC transaction accelerator!

Around this time yesterday, even the Free BTC transaction accelerator wasn't helping. They had 98 slots left for the hour, but whenever I would try to push the transaction for OP. A notification would pop up saying that the fee rate in the transaction was way too low.

[hosseinimr93]

Around this time yesterday, even the Free BTC transaction accelerator wasn't helping. They had 98 slots left for the hour, but whenever I would try to push the transaction for OP. A notification would pop up saying that the fee rate in the transaction was way too low.

ViaBTC doesn't accelerate transactions paying fee of less than 10 sat/byte freely and that's why you couldn't submit that transaction.
To accelerate such transactions, you have to use their paid service.