Bluetooth keyboard won't work

My bluetooth keyboard for my android tablet won't work properly. For instance when I press S it types "Asd" when I press 2 it types "123". I tried to reset it, but now it won't connect at all. It also keeps selecting all the text and deleting it. Any advice on what I should do?
 
Ok the tablet is a samsung galaxy Tab A (2018, 10.5) and the model number is SM- T590
The keyboard is an FCC Wireless bluetooth keyboard and the model number is BK 3001.
 
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