Hindustan Lever "pure It " Water Purifier — battery kit changing

I have bought a hindustan leaver product "Pure it" water purifier and i was using it for the past 1and half years, the battery kit has to be changed every 5-6 months once, every time when we order for the kit we wont get it, once i write to the website and after a months time they will get back and they apologize for the same delay in service they said they will correct it immediately, but after that also there are problems.

Recently i have ordered a kit through their authorised help line no. after 1 month still i do not get any kind of response from them, i have made a call 2-3 times but every time they take order for the kit newly.

There is no doubt the product is good, but the service they are offering is very very poor, now I dont want to continue with this pure it, I wanted to return it back, what can i do now?? please help me.

Regards,
Ramesh S