Micro SD slot not working

I have a Chuwi H10 Pro model number CWI529 purchased in March 2018 from Amazon. The serial number is HQ64G42170905559.

The Micro SD slot has never worked and I got round the problem by plugging another SD card into another slot on the H10. Now I don’t want to do that any more and wondered if anyone had a solution as to why the slot doesn’t work… Any idea please?

Barry