Mouse not tracking well / keyboard skips

Had this for 4 months and this is the worst wireless keyboard and mouse I've used. Mouse has horrible tracking and skips around or doesn't move at all then jumps. Keyboard is frozen or repeats input. I failed me right at the beginning of an online test and, even though I have to change the batteries often (which is NOT normal) and I put new ones in, both the keyboard and mouse are simply not responding to input. Had to resort to using the touch screen out of desperation.

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