It's difficult to revive the relationship because you've never met, the length of the relationship was short and you're still far away from each other. The person wouldn't bother to reunite with you because you have never met. He wouldn't see the need to reconcile or work out on solving what you were always fighting about.
You can wait for a few days (3-5) before contacting him. I suggest you send him an online text e.g. through email or text on his WhatsApp number.
Don't be needy or desperate when you contact him. Ask him to give the relationship another chance. You can work out on solving the issues that led to the 'death' of the relationship.
If he doesn't respond or doesn't want to reconcile, it's time to move on. Thank him for the short time you've known each other and move on.
The demerit of a long-distance relationship is that it's very difficult for the failed relationship to reunite after the breakup. This is especially the case when you've been in the relationship for a shorter period of time.