Exorbitant Costs and don`t honour commitment

I was advised telephonically by Wackers that they provide free quotations. Afterwhich I took my vehicle to Wackers on 17 Jan 2018, for a faulty clutch and motor oil leak. I was then contacted on the 18th Jan, advising that they need to charge me 2 hours of labour in order to determine the cause of the issues (+-R1300 later). I was then called a bit later with a quote, which as as follows: Clutch kit replacement-R6270 (this is double what other providers charge), Input shaft seal-R210, Grey Cover-R360,5th gear housing-R2500, push rod-R898.10, Totalling R10200 (which I had to negotiate to R9200, by convincing them how unreasonable their costs are). Which I believe is a complete ripp-off. I wish I could cancel everything, however was advised that certain items broke when they tried to determine the issue with the car, and that I would still be liable for their labour costs as well as have to tow the car home. They clearly operate by getting their customers in the corner, with no reasonable alternate choice. Anyway, would definately not recommend Wackers to anyone.