Poor service from Autogate/Auto-rollers

I had roll-up garage doors installed by Autogate/Auto-rollers in July 2017. On a number of occasions the sub-contractor, Weston, who installed the doors and motors, had to come back to sort out issues with the motors. About 6 months ago the garage door kept jamming when closing, then it would roll back up, bypassing the safety bracket and rolling in on itself. I phoned repeatedly to report the problem, but apparently each time Weston reported back that he could not find a problem, despite the fact that he kept adjusting the motor and even used an angle grinder on the motor. Once the guarantee expired, another sub-contractor was sent to assess the problem and reported that the drums needed to be changed and the motors needed to be moved. Nothing was done about it. I kept reporting the problem, but nothing was done. Two weeks ago the garage door rolled back in on itself, unraveled and was flung outwards, almost hitting me and my car. I happened to be recording the door at the time because I wanted to send proof to Autogate that there was a problem. I sent the video to Emmarentia, the receptionist. I made several phone calls that day as my garage door was half open and flapping and couldn’t be closed. Six hours later Weston came to look at the door and then went to report back to Emmarentia. Emmarentia said she asked Kobus, the owner, several times to phone me and discuss the doors with me. To date nobody has phoned. Nobody from Autogate ever returns phone calls or has the decency to give feedback to the customer. I was told by Emmarentia and Weston that I will have to pay for my garage doors to be fixed, even though the problem existed before the guarantee expired and nothing was done to fix the problem. I have said that this is still covered by the guarantee and I will not pay for it, so now I am being ignored. Again, nobody has had the decency to phone me to tell me what is going to happen. Their after-sales service and common decency is appalling.