Congrats that you got your transaction confirmed. If you pay viabtc service which is 0.01btc and I don't have any idea why do anyone has to use it, you will get confirmation or money back. Another way is pushtx.btc.com and they can offer low fee sometimes but usually none of them worths to pay. Better to contract any serious miner and ask for confirmation in exchange of some money, I think they will do it more cheaply.
Consider this advice in future.