Royal Enfield — oil cleaner stud thread damaged after changing the oil seal

Address:

Ernakulam, Kerala, 682019

I am using royal enfiled electra since 2015 onwards. I did my last service in kaizen motors vytilla (Oil seal changed), cochin on 18/11/2017 and received back the vehicle on same date. While checking the vehicle i found that one of the oil cleaner stud damaged and it is not fixed properly. I am back to the service supervisor and raise my concerns, however i am getting the replay that it is damaged in earlier service. I did my all the vehicle services in authorized dealer only.