GT Garage Doors Cape Town - After Sales service Failure

Had a very bad experience with GT Garage Doors in Cape Town after paying them to fix my garage doors in Stellenbosch, the door broke down within 3 months. They responded to my call and refused to fix at their own cost. They claimed other reasons were the cause, and left without returning my door to it's original state. I would have thought my 3 month warranty would be sufficient.