amazon says contact the seller and sent their contacts. The seller has an answering machine that they do not work until July. Logitech at first said that they would send a new mouse from abroad, then balked that, they say, little time had passed - contact the seller. I wrote to them that enough time has passed and the seller is unavailable. I'm waiting for an answer. In correspondence with Logitech, I put a link on their website on a mouse without SE. As a result, instead of the G502 SE Hero with a laser, I got the G502 Hero with an LED for 1000. cheaper. However, I am very grateful to Logitech for replacing-helping, just incredible.
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