What hash rate exactly do you expect? S9 miner hashrate is around 13TH/s on average is if you have 10 machines then the hashrate you can get is around 135TH/s.
Do you remotely access your miner?
Actually, If I'm the owner of where you hosted your miner I also charge for KW/h because if you have remote access anytime you can replace the firmware that could increase the miner's hashrate. It means it could also take more power so it must be charged by KW/h.
The only problem with their service is that they keep running the miner even the contracted date is 3 months past which is suspicious.
Are you the guy from this thread
https://bitcointalk.org/index.php?topic=5145072.0He said he will host 10 miners on bit49?
Actually, I couldn't trust my miner to them because they don't have a reputation yet here on the forum, and even outside of this forum never heard of them. Someone promoting their service here on the forum but you shouldn't trust any shady site like that.