GM-F5 not working

I bought your GM-F5 two weeks ago on Amazon.it and suddenly it stopt working. I can still connect it with the cable, but if i want do pair it with the wireless reciver, the mouse blinks one time white and is then dead, until i plug it in with the cable. That process is repeating everytime. I saw on you support page, that also other costumers have the same Problem. So my question is, is that a factory issue? If yes, do we get a replacement.

I hope for a quick reply