hwf

I have a 3 year old pool in middle ga. ground is red clay. Had a problem last year when ground water got high, it bulged out the liner. The next day it had all pulled back in place. Earlier this year, the groundwater got up again and it washed some balls of vermiculite out of the corner and stuck behind the liner. This week we got alot of rain. The liner bulged again, rolled the padding in a few spots, popped the liner loose in 3 different places. I can see more "balls" all in the walls. What a mess. Still waiting on my pool contractor to come take a look. Anybody know how in the world this can be fixed?