I have bought GK-08 model keyboard. Keys are not responding at all. I tried all steps that are given in other posts like charging it for 30mins, try keeping in another USB port, connecting to other system, keeping the keyboard close to the system, removing ALL Bluetooth records and wireless accessories from the device except the iClever. Still it is the same. I am from hyederbad , India. Is there a service centre wher we can get it troubleshooted?