Royal Enfield — Break Fail of Classic 350 three time within 10 days

Service center persons have no knowledge what to do, they firstly remove one part (change oil) then hand over and then for second time they remove break cylinder and again my break fail, every time they charge for this but my bike is under warranty (purchase date 17 jan-21). Also they provide wrong information regarding warranty as break cylinder come under warranty but they told that it is not come under warranty
No one is listening, neither service center nor the call center
Service center: Shree Radhey Govinda Automotives LL
Bike number-DL3SET 4812