It doesn't matter where you bought your phone. It ONLY matters for what market the phone was manufactured. Your phone was made for China and until Apple Intelligence is permitted to be used for Chinese market phones, you will NOT have Apple Intelligence.
People SHOULD pay attention to the model iPhone they are buying. iPhones are sold regionally and there are ALWAYS regional differences to accommodate different markets.
The next time you buy an iPhone, you should pay attention to the model and the market it was manufactured for. I don't know who you bought your phone from, but clearly it was NOT from Apple. Apple would NOT sell iPhones in Turkey which were manufactured for China. Complain to whomever you purchased the phone from.