Did you challenge them for proof that you accepted these changes, or request escalation to a supervisor to plead your case?
Failing that, perhaps try HUACA, as past reports suggests a lot of inconsistency among QR agents
Just received an email from the Colombo office informing me of the schedule change, I will try to work with the Colombo reservations agent to revise my itinerary.
You suggest that I get this fixed over the phone rather than in person in DOH/CMB as technically if I start my trip that could be used as an “acknowledgement” that I accepted the inbound trip changes?