Vodafone India — very very slow internet and no response even after 7 days only of complaint

I am using vodafone number [protected] since very long time and recently around 14th oct, i took rs.195 plan with unlimited call and 1gb data for 28 days. But till date the internet connection is very very slow even google search page is taking long to open. I am stating same area since the time i took this number and earlier i was in postpaid plan and there was no such issue with internet speed.

I put the complain through email and call as well on 18th but till data no one called or responded to look to resolve the solution. They said some one will reach before 26th oct. I am waiting for same now:). And my half of the validity date will pass by then.
And another stuff : i have been charged for a customer care call (Starts with 1800 — ) and they said it's not free to call this number (I think this 3rd category as for vodafone other than mobile and landline which are free in above plan, whereas i have airtel network provider to with similar plan and they did not charged for this kind of number.

Waiting for response!

Regards,
Rajiv