Hashnest charging 300% to 400% mining fees.
After I bought extra gh/s.
Tickets never answered.
I had to sell and withdraw all, to stop losing money.
I am doubt support will answer your questions because it is not about something wrong on their service, you should calculate before make Investment on there.
On august 8th, I was being charged regular fees.
After buying more gh/s on august 9th, they are charging me between 300% and 400% of mining revenue
did you checked the time interval between the blocks they credited to you? they will take more fees on longer period of time before they found another block.