3G connection not working as per SLA

Location/place: BANGALORE

Name of company/service: TATA DOCOMO

I have recharged with a 3G pack of 250 RS (1 GB 3g data and onwards 2g).

After recharge i am not able to connect to APN. Out of 10 try it gets connected once. I chcked with my friends handset same problem occurs. Made complaint also with ref no: PNR2012285003 but no solution.

After paying for 3G the service must be available to me when ever i want to access it not any random occation when network allow me to use. DOCOMO is not providing service according to SLA.