Ackermans review: I want to return a cell phone I purchased

Hi

I purchased a cell phone on the 23 november 2019, the box was opened by the person that assisted me at the store (worker there), my daughter is not happy with that cell phone, she wanted another cell phone a more expensive one, so i went to the same store on the 24 november to change the cell phone, but they did not assist me changing the phone, please i need to change the cell phone, i am paying for the account, i am not getting it for free

Please assist me