@ tkin, vickeybat: I'd suggest escalate this issue. Drop in a mail, separately, @ info[at]micromaxinfo[dot]com. Once, whatever they reply, you'll have a proof for your cause as you've shot in a mail at their customer service. After that, if the customer care cares to resolve the issue, it's ok, else, drop in a complaint at www[dot]core[dot]nic[dot]in, and I'm sure that the issue will be resolved. After getting a thrashing, the CC will automatically call you up to get it resolved.
Though, I have my reservations about these desi companies, I was thinking of the Canvas A116, and Galaxy Grand, MMX being the choice-for it's specs. Thanks, both of you, for this thread, I won't go the MMX way.