Unresponsive shifters on kB series 1

My shifting has stopped but problem my bike is 4 years old. I’m trying to contact WAHOO but nothing. Ticket open!
I could replace bars if necessary,any ideas.

Update on my bars and shifters.
I am pleased to say that Chris at WAHOO has been amazing.
He has sent a new set and they are upgraded from my old ones.
Mine were 4 years old but developed the fault.
The cables now are housed in a protective sleeve and the hoods are tight,mine before were a little baggy so tbh probably where they developed faults.
:crossed_fingers:For many more winters.

I still would like a service , belt,bolts etc which I will ask. Hopefully can source the parts from site

Happy bunny
L.j

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