[Resolved]  Matrix Cellular International Services Pvt Ltd — Credit Card misused

Address:

Bathinda, Punjab

Respected Sir/Mam,
I had purchased a sim card from MATRIX cellular from the airport before travelling from Australia(No.[protected].I was assured that 1. the sim will be activated in Australia and for Australia use only
2.validity is for the period of travel 2nd to 8 th june
3.they assured me to use the credit card for bill payment and blocked Rs.5000/- for security reasons.
4.and if overused it will be deactivated
And now my bill for travelling time is Rs.2541 and for India use is (which i do not know what are they charging for) is Rs.6756
I called the customer care (there supervisor named FARHAN from Allahabad and they do not have any proper explanation of my questions
1.Why is the sim still working after the validity?
2.Why was it not deactivated after it the bill was reaching the limit?
3.Now there is no procedure to deactivate the sim and they are saying me to courier the sim to them at my expense and headache as they do not have any pickup service in my area because now they are telling me that is should have returned the sim to them(Who does that and why should i do that?)
4.There customer care said that they will charged Rs.750 to deactivate the sim which they do not want to spend.
So what should i do?As my CREDIT CARD no. is with them and they can choose to use it at there wish because the use of this card was only valid for the travel period.What should i do against this bogus white collar frauds.(Don`t buy there sim cards if you have to do not use credit card they cause a lot of mental harasment)
Please help me I want to go to the extent i can to reveal the truth about this company .
Thanks