Theft and Poor service

I purchased a Mecer laptop in November 2021 with a one year warranty at Incredible Connection Cradlestone mall as part of November Black Friday special. It was the display unit as they did not have stock. Now in January 2022 I faced an issue where the laptop was working 100% and the next day it failed to switch on but was charging. I took the device to the store and booked it in, I was told it would be sent to the supplier for inspection. Only now to find out that they claim it has liquid damage on the device where I have not had any liquid nearby the laptop ever. They cannot send me proof of liquid damage ( although I asked ) and only sent me a quote of R4800 for a repair, that is almost double the amount the device was purchased for, or if I declined the quote I must pay R625 to receive the device back, unrepaired. They never told me about the charges involved especially if declining a quote, now they state I have 3 months/ 90 days to pay one of the options or they have the right to s**** my unit/device. That is theft and so brave of you, Incredible Connection.