Parzival
If doesn't or didn't Which is correct ?

What is the deadline to contact if the refund doesnt arrive

Or

If the refund didn't arrive?

٢٨ مارس ٢٠١٩ ٠٦:٢٥
التعليقات · 2
1
doesn't
٢٨ مارس ٢٠١٩
1

The best tense to use here is the present perfect.

... if the refund hasn’t arrived?

٢٨ مارس ٢٠١٩