After sale service and customer care

After sale service and customer care really leaves a lot to be desired, putting it mildly. I purchased a laptop cash, had a factory fault, it wouldnt charge, went back the next day, product was replaced with yet another faulty one, I called the store, the salesman never returned my call. I went in the following day.NO one was interested in us. Friendlyness out by the door. Technican was unfriendly, zero customer service. I cancelled but had to leave the store without my money because I paid via debit card. I need to wait for a call from them because they cannot guarantee that they will generate cash the next day to pay me back. In the meanwhile my daughter starting her online exams on Monday. I have no laptop or cash to buy a new one