I see on
https://btc.com/ that there's an option called transaction accelerator, does it work 100%? it is kinda expensive
It does. You usually can't trust any "transaction accelerator" since 99% of them are a scam and fake. But BTC.com has its only mining pool, so you can pay them so they include your transactions in the next block they mine (or maybe now they have some deal with other mining pools...? I don't know).
It is indeed expensive, so it's your call. Either wait or pay them for a quick confirmation.
Since you confirmed it is not a scam! i will wait till tomorrow, if nothing changes, i'm going to use it! again thanks so much for your help and clarifications