You shouldn't keep repeatedly contacting someone since it's obnoxious.
Chris is on a date with his girlfriend, and Luke has run into an issue while working on their project.
Luke wants to solve the problem.
Luke watches several youtube tutorials on issues related to his project.
Luke calls Chris multiple times hoping that speaking to someone will give him inspiration.
Luke gains a deeper understanding of the various parts of his project.
Luke is unable to contact Chris for the next couple of days after Chris blocks him.