If you only got two years out of the Hayward cell then you may be able to replace it under warranty, as long as it was not a one year cell. Look at the serial number on the cell. If it starts with 1E then somehow you purchased the 3000 hour warranty replacement cell. Otherwise, it should start with either 3E (T-CELL-15) or 4E (T-940).
Hayward has recently reconfigured it's product numbers as they are phasing out T-CELL-15 and renaming it T-940 with the 4 year warranty on the T-940 changing to 3 years. The company has chosen to establish a new S3 series as their system of the future complete with cells that are designed only for that system and they can keep the generics out for at least 8 years.
The Hayward salt test at Leslie is a simple PASS/FAIL test. No maybe's or reason why the cell failed. You may also be able to squeeze more life out of the cell by changing the cell type to T-9, T-5, or T-3 if you have a board that is at least r1.50 or higher. Generic boards are also available but they are more trouble than they are worth in my opinion as the readouts are different than the GLX-MAIN-PCB board. The biggest drawback is you cannot switch cell types.
Generic reseller's like myself are good for mostly only t-15 cells. IMO, you are looking mostly for customer support as some of us are very good but some have non-existent customer service. As I've said it the past, just stay away from Salt Pool Store (the grey CompuPool cells) that offer prices and warranties too good to be true. Hint; just add the word SCAM or REVIEW after the store name to see what I'm talking about. Surprised so many customers still fall for their tricks.
Circupool has a good T-15 equivalent cell that does not require you to purchase their controller.