Thanks Jaymin for all your good suggestions.It's really helped and worked.Just now I checked my balance.It is ok now.I also would like to thank the Videocon online team.They are really helpful.I donot comment about their customer care team.At the end I feel it is merely a technical fault from their online portal site which is not properly updated and capable of handling of good offers they want to provide.Hope they will overcome it asap.My all good wishes are with them.Happy diwali in advance to all.