Remtec are *******

I purchased a remanufactured engine from Remtec in February 2024, I went for their engine as they offered a 100000km warranty and everyone else provided a 10000km the engine was fitted but had an oil leak Remtec approved the replacement of the gasket and my mechanic went ahead when he inquired about payment for the repair he found out Remtec has closed down. now they are trying to recover their funds from me and I'm out of a warranty.