kaaak service from ackermans denlyn store

On the 31st of July we bought a mobicel tablet @Ackermans(DENLYN MAMELODI)for my 5year old daughter ,which when we got home we switched it on and the tablet had a scratch on the upper left side and the exit button was not working at all. took the phone today(1st august 2020) to the store and they concluded that we the ones who damaged it, okay let's say the scratch...and the left side that is untouchable??so they advised they taking the device for assessment to determine who's fault is it with the scratch and the mal****ion of the phone that we couldn't press, so obviously they going to say it is our fault because that's what they told us without even taking the device for assessment and now we have to pay for the repairs??/it's either i get my money back or a new device because there's no way i am paying for the mal****ion of the phon. the guy at the store was very rude and so sure that we damaged the phone...i need either my money or the phone iam not going to pay for no repairs on the phone