Virgin Mobile Prepaid — unauthorised change of tariff plan

Address:

Bardhaman, West Bengal

Sir,
I have a vergin mobile prepaid connection ([protected]),when I get this connection the said company offered me a plan in which first 3 min vergin to vergin call rate was Rs.1/min.After this three min vergin to vergin free call upto 200 min through out this day.But few days ago the said company doesnot give me the fecilities. I complained the customer care representatives, but they did not give me satisfactory answer.The said that I came into new plan ( 1paisa/second).But I never recharged any power any time.
Please take serious steps as The said company will bound to avail me the previous plan.
My alternative Mobile number is [protected].
Thanking you.
Your faithfully,
Suman Das.