confirmtx took payment from me but did not provide acceleration. wasted my bitcoin on the confirmtx service fee+ btc transaction fee. that was about 100 bucks worth 
It didn't took payment from you but you have sent it hoping that your transaction will be accelerated. I was a victim too by confirmtx but it seems that they aren't really accelerating transactions. They can't cater especially those transactions that has low fees, so like others I'm doubting it too.