As you can see I am not a heavy user its mostly incoming messages and calls from 2FA and Doctors/Hospital etc. I have no need of any internet stuff on this phone. the screen is the size of a postage stamp anyway and I dont think it supports downloading apps.
GPRS is a very basic and limited data connection, so it sounds like you have been charged for this service running in the background. Sadly, whilst I appreciate where you're coming from, the charges are valid and we would not be able to issue a refund for the data usage used.
If you're still unhappy with the resolution and information we've provided, please let me know and I can raise a complaint on your behalf in regards to this.