Bad Service from Hirsh / Defy

Bought a Defy washing machine 25/5/2019 and took out the maintenance contracts and washing machine is still under guarantee. It started making a load noise and then Hirsh called Defy who send in a technician who now says they need to replace the gearbox. For a machine under warranty still why is this machine not completely replaced. Why must I as consumer call Defy to get this resolved when I paid Hirsh for the machine ? Been now without a washing machine from 21st Sept and not ETA on when this will be fixed? Absolutely shocking service. I want my machine replaced as this was not a cheap machine and broke within 15 months of having it and now you just want to "fix" it?? Surely under the CPA this machine should be replaced?

Hirsch Inv *** / ref 228304