@Yes2
You haven't said what you've tried already but after checking the basics, ie; fresh batteries, re-pairing etc if your Sky Q remote is definitely broken/faulty, if you follow this link it should allow you to do some more troubleshooting and then it’ll send you to a form to request a replacement (apparently this is not available to customers in the ROI).
https://www.sky.com/help/articles/lost-stolen-damaged-sky-q-equipment#get-in-touch
It may be quicker to purchase a new remote from a retailer or larger supermarket. If you do that as well as the above you’ll have a spare.
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Sky customer since 2001
with: Sky Q | Sky Superfast Broadband | Sky Talk | Sky Mobile
NOTE: I only provide help on the forums and NOT via PM
