"Me? Do you not know the great Rishi (Sage)?"
Surya could not able to understand how come Durvasa is not seen through his simple disguise, Others might not be able to see through it but Durvasa is like others, He is divine and part of Supreme just like him, Surya.
And not only that, The karma and Yogic power of Durvasa is also one of a kind. There is a reason why he can curse anyone he wants on will, So it's illogical for someone like Durvasa not to see through his disguise.
Surya, even though that Durvasa is playing games with him, Just to see if he himself fesses up with his crime, A chance to come clean before Durvasa decides what punishment to him.
"I don't know who you are that's why I asked in the first place or do you take me as a fool to ask stupid questions? Jai Shiv Shabhu."