Running away from Refund

Bought a laptop from Platinum Selection end of March 2022 and the unit gave us problems, we booked the system with the company and they fetched it and assessed it and said there was a problem with a faulty battery which they said they exchanged and sent it back, upon arrival we charged the laptop but it would not charge then we booked again, they said after assessment they found a sticky substance which when asked when did it occur as the laptop was never used they don't give us straight answers but tell us that Recton is the one who assessed the unit, now they do not want to refund us.