LAPTOP MOTHERBOARD CRASHED AFTER 3 MONTHS IN USE !

i Purchased a laptop from Dion Wired in April 2018. They had a special and I called all the stores and finally found that Dion Wired Cradlestone still had the special in store. Upon purchase of laptop, I was advised that they do not know where the original charger is, however the salesman advised that I can purchase a universal charger, which will work with the laptop. I bought the charger in the same store. 3 months down the line the laptop stopped working. I took it back to the store and a different salesman advised that they should never have sold me the laptop without the original charger. The same salesman called me back today advising the the motherboard is fried due to the fact that I was using a universal charger. I use this laptop for work and have now been without a laptop for almost a week. They do not know how long it will take to replace the motherboard. NOT HAPPY AT ALL !