Cal Spas gasket leaked due to cal spas chemicals and pump is broken Ripoff Ontario California

I have only owned my spa for 1 year and 11 months. The motor started making noises so we called Cal Spas. They had a contractor who came over to establish what the problem is and he told us that the chemicals caused the gasket to leak thus allowing water into the pump and the bearings rusted. This is apparently not covered under the warranty because we were told that we used the chemicals incorrectly. We purchased Cal Spas chemicals, check the balance all the time and applied the chemicals according to the instructions on the containers and in the manuals. To fix the pump it is going to cost $500. I dont see how if we use their chemicals and it makes the gasket fail and it ruins the pump that is our fault. I just don't get it. I have noticed a number of complaints on the web that are just like mine and Cal Spas refuses to take care of the matter under the warranty. If my situation is not covered then what is?

I want Cal Spas to pay for this work and I believe it does fall under the guidelines of their warranty.

Brent
upland, California
U.S.A.