Centurion sold me a defective battery

I was sold a battery by JKS on the Bluff, battery lasted 2 months and stopped working, swelled up and apparently as per the report done by Centurion had loose pieces inside. Centurion did the battery report and notes the battery to be swollen and have loose pieces inside, to which I agree but then your report goes on to say that my gate motor charger has overcharged the battery which has caused the damages, to which I disagree. I purposely bought another Centurion battery from JKS, its been just over 2 months and have no issues with the current battery, so if my charger over charged the 1st battery to cause internal damages, the it should have done the same with the 2nd battery too? Centurion did not inspect my gate motorto determine my charger was faulty but gives me a report to state its faulty, I've had an independent installation technician check my gate motor and charger and absolutely no issues were found. So the cost of the battery is minimal, its the point of how you conduct business and try bully a person who you think does not know anything about electronics I own my own insurance Assessing company and deal with these types of claims on daily basis and have a full team to give me a report to justify my findings. If Centurion or JKS do not refund me for a battery or replace my battery, I'll never recommend your brand going forward.