WTF I rented a 2100k/s rig.
But the real hashrate is always below 1000kh/s
Can I get back my money？
What rig number did you rent I am just curious. Also try changing the pool you are connecting it to. I believe that Betarigs is based in EU so if the pool you are trying to connect to has a port in EU it would probably be better to send it that way.
Sorry about your bad experience just trying to help.