Concentric slave cylinder failed after 6000km!

Between November 2020 and March 2021, I had R28 030's worth of work done at GearBox Select. Transmission rebuild in November 2020 (R14000), concentric slave cylinder replacement February 2021 (R6325), LUK clutch replaced March 2021 (R7705).

Important note to all this, I work from home, and hardly ever need to drive. When there is a need to drive (on a weekend) we rotate between my wife's car and my vehicle. Around September 2021 the clutch pedal stopped coming back all the way, but due to covid, work, and illness, I could not attend to it sooner. February 2022 I phone GearBox Select, they say it's probably air in the system and I must bring it to them.

March 2022 I finally get a chance to take the vehicle to them. Vehicle has done ONLY 6000km in one year. After a week there, they phone and inform me the concentric slave cylinder is faulty (again). This is a slave cylinder they fitted 6000km ago. The best they can offer me is a discount on the labour. Yes, I need to pay (again), to have a concentric slave cylinder fixed, that was fitted only 6000km!! and 12months prior, by GearBox Select. That's how they stand by their work... I politely asked for my keys and left.