Defective jack port on Megaboom

Hi,

I just bought the limited Big Black Dragon edition of the Megaboom.

It works perfectly as a Bluetooth speaker but there's a problem with the jack port.

The sound only comes from one side of the speaker. If I want normal stereo sound, I have to hold the port of the cable slightly on the right. I tried with 3 different new 3.5 stereo jack cables, same result. There seems to be an issue with the port itself.

Do you know if there's a way to fix it by myself? I don't want to return it to the store since the Black edition is very limited and I'm afraid they will give me another regular version as replacement.

Thank you very much for your answer/help in advance.