And it will be difficult to get any service as Aquila boards (Spain) owner of ONEAN is in liquidation, unless ONEAN is bought by a new company.
https://www.einforma.com/informacion-empresa/aquila-boards#ancla-datos-comerciales
Maybe a dedicated ONEAN forum user could help you out ? In the worst case, since your warranty is not active any more, you could replace your remote by a proven efoil one like the Fero remote:
Hello eFoil, eSurf and eBoard enthusiasts,
[remote front render v9 web]
I am so happy to finally announce that my remote is coming to the market. With the help of eFoiler GmbH and very talented colleagues, we finally met our expectations and feel ready to release our remote to you. After 2 years of research and development, we achieved a two in one solution that truly is the dream for every DIY builder. On the one side, our remote is a high quality waterproof low latency controller and on the…