Pricing Mix up made me pay more than what I budgeted for

They advertise Xiaomi Redmi 15C for R2799 and the Redmi 15C 5G for R2299. I'm wanted to buy the the Redmi 15C 5G but when I add it to the cart, the price goes to R2799. I contacted customer service by email and they said it was an error and cannot assist me about it. I was disappointed and hurt.

I went to Edgars Kollonade Mall in Pretoria and the cellphone consultant was friendly and welcoming. She explained all the phones on special and I was impressed by her professionalism. I informed her about the mistake Edgars did on line about swooping picture on the Redmi 15C and the Redmi 15 C 5G and the pricing mixing up and she couldn't help me because it was an online error and not the store.

I ended up buying the Redmi 15C 5G for R2799 and my budget was R2299 as it was and still advertised online. I really feel like customer service didn't treat me fair and made me pay for the mistake and confusion caused by the store.