How do I get warranty support for this keyboard? I bought two of these keyboards from Revain 6 months ago. I liked them but one of them is now unstable. The space bar blinks intermittently, I can't type anything because I'm typing spaces! The keyboard is also constantly turning pages and jumping to previous pages like it's possessed! I am contacting the seller, please contact me for a replacement. Many Thanks. Update 08/12/21 The company sent me a replacement for the defective keyboard. Excellent customer service. I have raised my rating from 3 to 5 stars.