I did a quick search for this problem and got a huge slew of ressults. Here's a few:
https://m.youtube.com/watch?v=aOsVh3m3JIg
https://www.volkswagenforum.co.uk/threads/2016-polo-1-4-sel-tdi-wipers-stuck-on-intermittant-and-wont-switch-off-totally.36665/
https://www.linksautomotive.co.uk/2022/02/21/vw-polo-windscreen-wiper-fault-fixed/
As usual, there are many enthusiast VW forums - especially for the Golf - which would be useful to look at and which may be a better place to ask questions.
Rhdbdh, April 2023
