I am using the net services provided by a particular telecom company.

Question

I am using the net services provided by a particular telecom company. The problem with the service provider is: I use prepaid plan of 1GB or 100 MB of 3G data. If we connect to the net on 2G setting and then we change over to the 3G setting, nothing gets deducted from our account. But if we connect at 3g settings, data is deducted from our account. I am sure that the company is unaware about this fault of the company and I am unable to contact the company. I know that this is a fault with the company and I tell my friends that it is Haram to use net in this way. But sometimes due to network problems I have to set auto setting or 2G setting when the 3G signal is not available, but when again the 3G signal is detected it gets changed over to 3G; in that case too nothing is deducted only the data used at 2G speed is deducted but after change over to 3G nothing is deducted. I am helpless in this matter. Is the free data so gained permissible for me.