Very disappointing encouter with Somerset game manager

I bought a bikr for for my 5 year old, the bike was already assembled and on the floor, th releah technician advised he assembled it the morning of my purchase, couple of days after purchsed new tube needed to be bought, and a day or two after second tube needed to be bought. My son took a break as i was not well to fix it but on the day i got stengnth to fix his second tube we discovered the chain was loose, not only loose but with crack to almost broken. Thats when i decided th3 bike must return as it has failed its quality check and as a customer i had a right to return it. Not me and my disappointed 5 year, infact crying at the store for his new bike to be told by a manager at someeset west mall in cape town by a name of Sisi Connie i was told that she can take the bike the chain is not warranty, she completey dismissed me when i said i am not here for the warranty, this product has not been in use not even a month for me to be replacing broken chain. She was not interesred in customer rights amd my son left there crying. This brand must be removed from the shelfs and game must do better in procteting their customers