Consumer Rights Act was updated a couple of years ago and states that if a product doesn’t perform as advertised or becomes unfit for purpose within an unreasonable timeframe then the seller (not necessarily the manufacturer) has to be given at least one opportunity to replace or repair the product. If the replacement / repair is unsuccessful then you’re entitled to a refund.
General rule of thumb for electricals is that you should get at least 12 months (a reasonable expectation) - you can still claim after the 12 months but at that point the onus is on you to prove that the item is defective as opposed to “wear and tear”
If you didn’t buy direct from DJI then start with the retailer.
Hope that helps - good luck!