Daylight ******* from makro

I purchased a karcher vacuum machine from makro in cornubia. When purchased they assured me the machine had a 2year warranty but after 18 month of use the machine stopped working! I booked it in for a repair and I was told that it's R5200 which doesn't make any sense as I purchased the vacuum for R4500 or there abouts! It's shocking that they list over use of the product as a reason to not uphold the warranty, it seems makro are trying to coerce me into purchasing another vacuum to boost their sale cause it would not be logical to spend R5200 to repair a R4500 vacuum and if they can not honour their initial warranty how would they honour a warranty of the repair? I'm appalled that a big company like makro would give such poor service and not honour their warranty! I will await a response from makro and if it is indeed the case I will rather stop shopping at makro and support another business. I will provide all necessary invoices and communication between myself and makro.