Chosen Solution

My MacBook will not start at all and my chargers are OK

To isolate the issue down you’ll need to get a USB-C power meter like Satechi USB-C Power Meter Tester Then you can check your connections and see if the system is able to charge. Otherwise you’ll need to get your system to someone who can test your system and fix it. Do you still have warranty coverage? Did you sign up for AppleCare+? If either are true its time to visit an Apple Store or authorized service center.