When you are complimented in anyway regardless of the fact that you don’t like that particular thing that attracted a compliment, do not say, “Really? I do not like it”. Recieve the compliment just as simple as it came, smile and say, “thank you”.
The moment you say, "are you sure its beautiful or i don't like it" you are actually communicating one thing, "stop complimenting me" and that is not what you really want to communicate.
Courtesy always demands that you say, "thank you" when you receive a compliment. Correct?