I'll give you one of the best tips you can get here, move away from rc bazaar and buy stuff for quads from elsewhere. There are many other stores such as Gettbs.in, rchyper.com, quadkopters.com. Check these websites out and buy your parts from there. A good charger is important, these b6ac always are bad for batteries. Check out isdt or skyrc.

Alright, certainly will check them out.. but for now I would like rcbazaar to atleast repair or replace the charger.. as it costed around 700 and it shouldn't conk off in one charge... well as for the battery, it seems to have recovered from 1.7v on cell 1 to around 3.10v.. and overall voltage is 10.4v.. is it safe to use now?
is it normal for voltage to recover like this?

To be honest. The b3ac Chargers are dirt cheap around 300-400. Not even worth 700. If you don't care about your batteries, you can use it. Also can use your battery after full charg but the cell that went below 3v will always sag before the rest.

I see this charger a good one to buy? It is not the original skyrc one.. but it seems to be the exact same. I will order this off amazon as the Same one is available there.