meindl island pro problem

I have a pair of meindl island pros about 2 years old, they have not had a lot of use.They are my second pair, at first the rubber at the toe started to lift, when I spoke with a supplier who recommended to use some form of rubber glue, which had little success. now to my dismay after a few days away and the constant sloshing of water coming from the boot I've found the front half of the sole is coming away from the boot.This from only wet long grass.Would they be successfully repaired or do I try anther brand.
Steve
Steve