Sorry to hear you're having trouble with your MVP 5. Here are some general things to try. First, do you have a different USB-C cable to plug into? If so, try using it and also plug the cable into a different power source (your other USB-C cable might have a problem). Then, let it sit for 5 - 10 minutes even if it doesn't look like it's doing anything. While it's doing that, take your tank off and check the connection to see if any eliquid leaked. Is it dry? That's fine. If it's wet, take a dry Q-tip and very gently swab the liquid out.
Once you've had it on the charger for 10 minutes or so, while it's still plugged in, click the power button three times to see if anything happens.
Let us know if any of that helps?