I Can't Return Unused Huawei Watch GT 3 Active

My friend got Huawei gt 3 active smartwatch as a gift for my birthday. I opened the package but it is not suitable for my use and I did not like color. I went to Teknosa for a change. We have right of withdrawal 14 days and 14 days unconditional refund is written on the huawei website. But Teknosa refused. Teknosa said, We are Teknosa. our rules apply. When they sold it to my friend, they said if they didn't like it, they would return it and replace it.Typical shop assistant dialogue will have to use this product The price of the product I had to use is 4000 TL. I will seek my rights in consumer court. Even the gelatin of the product is on it. I opened this package so that it wouldn't be a shame. but it is not suitable for me. they need to refund or replace. I couldn't decide without opening it. whether it is suitable.