Our opponents assert that no Prophet will ever come, but instead of relying on the Holy Qur’an to substantiate their claim, they emphasize the hadith. They claim that there are many ahadith which conclusively prove that the Holy Prophet(sa) was the last Prophet with reference to time and state that after the Holy Prophet(sa) only false prophets and dajjals can appear, no one else. In other words, these opponents seem to believe that, in the Muslim ummah, the door to true prophethood has been shut forever and the door of false prophethood has been flung open for all times to come. This is the concept of Khatamiyyat that they have proclaimed vehemently.
Some ahadith of the Holy Prophet(sa) have been cited in this context. One such hadith is as follows:
This has been translated as:
Thirty imposters will be born in this ummah, each of which will think or claim himself to be a Prophet, despite the fact that I am the Khatam of the Prophets and after me there will be no Prophet of any kind. (Abu Dawud Kitabul-Fitan, vol. 2, p. 234, published in Delhi)
It is argued [by them] that in light of this hadith, how can the door to prophethood be declared open? I agree completely that if the Holy Prophet(sa) closes a door, nobody has the authority to open it. We say: 
[We believe and testify to its truthfulness]. I declare on behalf of the Ahmadiyya Jama‘at that we accept it—and we have no hesitation in declaring it. Similarly, nobody can close a door that the Holy Prophet(sa) has opened with his other hand. This is the real point of contention; otherwise, there is no disagreement that whichever door the Holy Prophet(sa) has closed will remain closed and whichever door he has opened will remain open.