Vodafone / Voice — Weird customer support

Address:

Rangareddy, Andhra Pradesh

My name: Surya Krovvidi.
Phone#: [protected]
Current plan: Rs 199 CUG, 200 Local and 200 Std Min.

Called customer service (111) and requested for plan change. They don't support the plan change, since it comes under corporate connection.
I sent email to customercare.[protected]@vodafone.in, requesting to plan change. I had sent initial email on 13th may 2013. I received a response through email with some plan files. I could not understand the information provided and requested them to call me as there is no customer care number for corporate connection for plan change. Again 16th May sent email and requested to change the plan Rs199 with 600 Local min and CUG plan.
I have received the response same as earlier saying choose the plan from list of files attached. Then again I could not understand, please call me to understand the plan.
I am not getting support from Vodafone customer care, as the information provided to through email could not understand and no phone number to talk to them to clarify.

Its been 10days and no clue what todo.
Request your help on this.