This is your pool that you will have to deal with for the rest of the time you are there... a bad fiberglass pool install will give you troubles forever and they will not do anything to fix it...
If it were me I would have them start over doing it correctly, it is not your job to install the pool correctly but now it is your job to make them do it correctly... have them get everything inspected at each major step ( you have already found them not to be trusted, they will pay an inspector to assure you they did it correct )
1. pull the pool out and excavate the entire area of the pool and deck and ditches to pool equipment
2. dig sump pit and install 10 inch pipe and run power and backfill with gravel
3. use gravel in bottom of pool and tamp level, great TFP Wiki
Gravel Around Pools - Further Reading
4. set the pool with a tractor or crane
5. backfill steps with gravel
6. install hard pipe in trenches with gravel below and on top of pipes
7. using gravel bring the deck area up to level
8. install raised rebar and tie in correctly
9 install bonding tying in pool, deck, rebar, pump and any lights installed
10. install coping
11. install deck not connected to coping
This is not an all inclusive list but a good start.. This is not supposed to be your job but now it is to make sure your pool is installed correctly...