The result of the first has yet to be implemented. Should the US have another presidential election just because Trump won (okay, poor example :)) Should the UK have another general election just because?
And if the second results in another vote for leave, should we have a third? A fourth? Dammit, we’ll keep them voting until they give the answer we want!
We live in a democracy. The democratic vote was to leave. In due course, the UK may apply to re-join the EU. I hope it does, and I hope that the EU gives us terms that the majority can accept.