Review on 💻 Premium Full Size Wireless Keyboard and Mouse Set - WisFox USB, Compatible with Windows, Computer, PC, Desktop, Laptop - Black by Jayson Sharma

After using it for several days, I noticed an erratic behavior where the character keys sometimes didn't work. I also notice how quickly the batteries are empty. I had to change the batteries twice in 4 days. This is an email I sent to the seller and he never replied so I sent the keyboard back. I suddenly had a problem with the Wisfox keyboard that I bought from you at Revain, the character keys don't work. Tried to disable the keyboard, does not help. Icon keys are unstable. The only ones that work when I press Shift are the following: %^_ are keys 5, 6, _. The rest doesn't work when the Shift key is pressed. They also don't print numbers unless the Shift key is pressed. Apparently there is a serious problem. Under these conditions, I cannot use his keyboard. Please suggest a solution.