My mac wasn't charging when I plugged it in and I took out the charger after about 30 seconds, and tried it with another mac charger which turned green but didn't charge it- my mac remained on 0% so I took it out after a few minutes. having left it for the last 2 days I tried the same cable and this time it wouldn't charge atall and when I looked at the charging port it looks and smells burnt, it now won't charge with any mac chargers. What can I do?