Magsafe 2 connector pin keeps burning out

Hello,

I have a 2014 MacBook Pro. About a year ago, My MacBook's charger stopped working, So I bought a charger from a local dealer, it was very cheap. In 1-2 months, the charger's power pins burned out and it stopped working. The dealer got it replaced and the new one too just stopped working in a month or two. He got it replaced 4 times already and this keeps happening.

I'm not able to find the issue behind this. Whether I am getting a fake charger or if it's an issue with MacBook's port. The charging port on my mac looks like this: http://i.imgur.com/BkoyAY8.jpg

Just some debris or something on power ports but I think it's because of the power pins burning out.

I'm from India, can anybody tell me if this is the issue with the port or the charger? I don't have any Apple store near me, So I am not able to get it checked.

I would really appreciate your input.