Exide Industries — UPS batteries also was about to blast

Website:

www.exidecare.com/find-exide/batteries-for-inverter

I have bought exide batteries for my UPS in my office as thought it to be a good renowned company but for my experience i faced a very bad experience. I bought a total of 15 Exide 12V 26AH SMF PowerSafe Sealed UPS Solar Battery on 23/04/2018. During these course of time as when power goes off i was not satisfied with the backup of the battery and when i asked the seller he responded saying may be my load was more so the battery is not enought but before this i had other brand battery with same load performed better.
Now because lock down company was shut for more than 6 months and during november only we opened again with half strength as government advise and in this time only once power went and all the total 15 batteries bulged together and it looked like it was about to explode.
I called the customer care asking for considering on covid situation as i know the warranty is only for 24 months which is over by now but i have not used the battery from february 2020 till october 2020 and even if the battery i worn out during their stipulated period it should only loose its charging and standby
But all batteries of same batch bulged and looked like a life thread as it was about to blast so it is a manufacturing defected product and i need the company look into this issue seriously and give a good solution.