Uncertified

I bought a acer mobile online got the phone but to my dissatisfaction it does not send file via wifi direct, when I open apps it tends to be slow among other things. I called the foschini online customer and was told to take it to the store and they will credit the money back to my account. Took the phone e with my papers to foschini in Johannesburg and was helped my Zama, she called foschini online and was told they cannot credit me because the phone is not damaged its just not meeting my expectations so i stick with my decision and it was within the 7 days period which if i am not happy with the product I can return it back. With the nca & the cpa legislation as customer I can return the goodsI if I not satisfied, can someone please assist me on this....Moses Koroloso