Help with the large Neca figure

Good evening

I need to say, this kinda sucks but I got a trouble with my Neca large Godzilla because it is not roaring anymore.

 When I received it was brand new working fine, I noticed I needed to press with a bit of force the button in order to make it roar, but I thought it was not a big deal; after a couple weeks it became mute. I tried by remplacing batteries using the ones of my atomic roar figure and then new ones, but it did not work. After tring hard, it roared a couple times but nothing more ever since. It seems to be a false contact in the button area, but if you already know something how to fix this issue will be very appreciated, specially because I cannot replace him due I live in Mexico, here there´s no place to buy a new one, and trying to purchase another here on web would imply at least a total expense of $100 due shipping.