Handgrip for Subnado Underwater Scooter

I purchased five of water scooters a little over a year ago, three have already quit working, throttle triggers went bad. I contacted them for warranty no luck, they want me to pay a crazy amount to ship the parts to me and pay for the parts, so I bought the whole handle on Amazon instead, they require a firmware update to work, tried everything spent way too long messing with the firmware update, never worked handles don’t work, back they go, and I have three expensive scooters that will never work again, i’m sure it’s a matter of time before the other two go bad also.

Works as it should

Just bought this. Doesn’t work for me either. Bummed

The media could not be loaded. What should I do?

Does not work