Game sold me used phone

I made the world's biggest mistake by purchasing a phone from Game Lakeside Mall, On the 11th September 2024 I went around looking to purchase a cell phone, i went into Game at Lakeside and a consultant showed me a few phones, i was interested in the Samsung Galaxy A15, the consultant told me it is a good phone and stated I should take it, any way we made the purchase , after some time I then noticed that the phone was not receiving signal and reception, i first went to cell c because i thought it was my Sim Card, they stated it was definitely the phone, i then took the phone the phone back to the store i purchased from, and it as if they had no interest to help me as the consultant told me to take it Vodacom because it they take long to return from repairs, anyway i took the phone to vodacom and after some time the phone diagnosis came back the phone need repairs, they state there is a few issues with the phone like sim reader and possible water damage but they state that this phone was definitely used before purchase date, and it would cost me R190 to take my phone as is and over R3000 (which is the price i paid for the phone) to repair phone, i then went to Game to advice what happen and asked for assistance because the phone is only 3 months old and should have a guarantee or warranty, once again i was sent away as Game requested for me to bring information from Vodacom, i then had to go Vodacom and the Vodacom Consultant left his work station to come and assist me as i am old and dont understand much of these thing, we called for a manager and a guy who was dressed in security uniform came to speak to us not even a manager, we explained to him the situation , even the consultant at Vodacom explained that it seemed that i was sold a phone that was used on display which is against CPA, the guy at intention of resolving issue and walked away, Please can head office of Game please intervene, as the Game store at lakeside staff are not helful, i am not young to be running up and down, the phone is new and even Vodacom confirms that this phone was used before sold to me, my who house is made of Game products like my washing machine, tv, and so many appliances, i have always been a loyal client, i dont think it is fair for me to pay the same cost for repairs for something that is not my fault, please assist as i definitely will go to the ombudsman and continue sharing my story on social media