Very Bad service Flight Centre SA

We had a ticket cancellation from the airline that was booked through flight centre, and the dates were changed without our approval and out of our schedule, therefore we had to ask for a refund, but the service and response is not just dissapointing, but terrible - after several phone calls to the person on our referral, and after talking to the Team Leader, and sending emails, one of the employers had to ask them to phone us back, and again we have to follow up on the progress because there is no response or call back - even after proving and stating the urgency of the matter.